You're suppose to fight the demon king. Once he is summoned he takes the power to gather energy from the dead. However, if you gather energy from the living and gain defiance, you can increase blood rage, combat, teleportation, and flight, then you can chase him down and kill him ( his health is the cure %). The more living the easier the battle and the more time you have, the remaining templars will help defeat him as well. if you gain humanity's trust (devolve blood pact, stop killing and focus on infectivity instead of lethality) the templars will spare you. If you humanity still wants you gone, you can absorb ALL of the demon kings power and gain even MORE DNA from the dead, and eventually claim the throne. Both of these lead to a better score, since cure% will be 0
I really want some movie about this plague inc scenario where the daemon vampire wants to cleanse humanity and he wants to gain their trust do defeat the daemon king by making a UA-cam channel and blows up but he grows to love his viewers and instead of killing them he wants to help them so when he summons the daemon king he gives a bunch of guns to his fans and empowers them with daemonic energy without corrupting them and attacks the daemon king and when he kills the daemon king he takes his throne and becomes a daemon king and ruler of humanity and makes a galactic empire
Fell asleep while watching your videos, left autoplay on. Woke up seconds before “kill the people of Canada for a minute.” Guess who’s Canadian and almost had a heart attack?
6+ billion people on the planet, that's a DNA cap of 6+ million, which would let you get the demon throne since it's only 99k. When you summoned the Demon Overlord it didn't take away all of your points, you went from 9120 to 908, starting the summoning ritual at 107k would be enough, unless it takes more points away the more you have. Edit: Unless it lets you buy it prior to summoning in which case that would be easy
he lost points since once the summoning starts you can only get DNA cap from the infected, not the dead, it was just the pool adjusting to the lower cap. To win you have to stay low on killing, so you can have enough infected once the ritual starts.
@@ByteSizedGamer Mainly it is, but if you read the desciptions of the ability you discover that there's one that gives cap per infected, despite not as much. And when you summon the demon you lose the cap given by the dead. That's why I think you need to kill as little as possible and infect everyone to be able to get that true ending, since that upgade is the only way to get DNA cap after you do the summoning.
I don’t know how much sense it would make, but if you made a sort of mini video in which you activated cheats just see what happens if you fight the Demon Lord, it might be interesting. I would watch it
You know what would be cool? A mode where you can fight *as* the Templar *against* the Shadow Plague. I know it would probably take a lot of work, but it would be pretty cool if they introduced it into the game.
@iytdominotikI also got a fun idea for a new sub gamemode of cure mode: Operation Plague inc. It plays dimilar to standard cure mode. Heres the twist. A shadow organisation controls the disease and you have to take both the organisation and the disease down.
I think to get that demon throne ability you need to overthrow the king, and to do that i think you must attack the demon king as he feeds. Seems like the only logical way personally, maybe give it a shot Pravus
Doesn't work, he moves far too quickly and randomly. The DNA cap is enough to get that many points, it is 1 dna point added to the cap for every 1000 kills, with over 7 billion people in the world, that is 7,000,000,000 / 1000 = 7 million, more than enough to get that if you are powerful enough, needing only 1 billion kills and some patience if you don't have abilities that decrease the kill to soul efficiency.
@@wolfwhitefireThe Demon King starts at 50% (cure = health) and reaches his full power by traveling to and killing off what remains of humanity. So if you just don't summon him until YOU kill everything...
@@modothegreat108 Not really sure which part of my comment you are replying to, could you please clarify? Your comment as is doesn't really seem related to what I said, unless you are theorizing that it might be possible to kill everyone off before summoning him and then it might be possible to challenge him or something.
@@wolfwhitefireThe Demon Lord is summoned when you get a specific research and return to a base, so there's no reason it shouldn't be possible to wipe out all of humanity without summoning him. And the Demon Lord seems to move around because he is attacking survivors one country at a time, so his movement would be limited if there's only 1 surviving country or none. In addition, the Demon Lord has a health bar (replacing the cure bar) when summoned, which only really makes sense if you're expected to fight him.
@@modothegreat108 Yeah, I can see wiping out all of humanity without summoning him being possible, though their are limits to the creator and I think that usually ends the game no matter what else, but if it doesn't it might limit his movement not sure, for the cure bar I suppose that is possible, but I suspect it may be for something, possibly fighting the Demon Lord, that is only possible to do with that expensive symptom for overthrowing him.
I may not actively WATCH some of your vids, but your voice is somehow... relaxing. I dunno why. Your voice seems to help me stay calm in high tension areas in games I play.
Plague inc popped up as an update on my phone. I’ve since become obsessed with it again, to the point that I’m looking up UA-cam videos about it. Your videos are so much fun to watch! Thank you for all the work you’ve put into them! I’ve been binging, and I can’t wait to watch more! Thanks!
13:10 I'm just imagining a vampire, with an old Macintosh computer, reading a manual on how to set up an account (the book) and just having the name Vampire_1213 or I_Heart_Blood and just posting on Reddit: "Yeah so the Templar dudes are actually a group of bad guys who are just killing innocent people thinking they're vampires." and the place he's posting this on "r/templarictalk", then moments later he just has food in the microwave finish cooking. Then followed up with maniacal laughter as he eats his hot pocket. *What is wrong with my mind? XD*
Indigofenix's scenarios have different endings and I am very interested on what all of those different endings The only scenario that I have seen pravus completed by indigofenix is the spiral scenario (forgot the name)
There are 7 endings that count as a "victory". 1) Don't evolve Shadow Slaves and kill everyone before summoning the demon king 2) Turn everyone into shadow slaves before summoning the demon king 3) Don't evolve Shadow Slaves, summon the demon king and let him kill everyone without betraying him 3A) Letting the demon king kill everyone after evolving Shadow Slaves ends the game with a victory screen, but has no pop-up announcing an ending. 4) Defeat the demon king without raising your PR or evolving Shadow Slaves, then kill everyone 5) Defeat the demon king without raising your PR, then turn everyone into shadow slaves 6) Raise your PR and defeat the demon king, but have all Templars destroyed (either by you or the demon king) 7) Raise your PR and defeat the demon king, leaving at least one Templar alive (or not having the Templars set up at all if you raised your PR fast enough)
You really wanna screw with the mechanics of this scenario? Drop on the double strain cheat. You can attack while being inactive and it totally gains you the DNA as you kill it's spectacular
Just a guess, I think if you devolve everything possible before he drains all of your DNA, you might have enough DNA with all the extreme cost of everything to purchase "The Throne of the Demon King", defeat him combat and take his place as dark commander of the world's souls. He asks if you are still his servant, and that he will kill you if you get in his way so hints combat is possible, and the description of the ability states "there can be only one".
see i reakon based on how the wording of the demon king showing up, that if you are blood rageing in the same country as him with free will and defiance you fight him, and once he is killed you can take the throne
Now this is how the world would react to such an invasion. No few thousand dollars given to one to three based, but mass pooling of resources at Carte Blanc(sp).
This scenario was super awesome, please make one more try if needed on cheats to see what will happen if you pick that one symptom or infect all the world. Maybe you can fight this herald and bhecome a new one.
Hey Pravus! I am subbed and a daily watcher, and my friend watches every once and a while. A little bit ago, he made a plague Inc custom scenario called footballfans or football fans (I forgot) and his user is funnystuff. I would love it if you could play it. It's hard on the harder modes, but easy on the easier ones. Thanks for reading
You have to pay attention to your reputation. You actually can get countries to like you and welcome you, there are good endings too. This relies on Free Will and Energy Vampirism so you can get DNA once the demon king arrives. After he does you actually can fight him and kill him, but itll be hard. There are 3 endings after killing the demon king and id love for you to revisit this scenario and try to get one or all of them, the guide i found in google is really helpful as well
Does anyone or +Pravus Gaming know what music is used for the game? I'm doing a vampire themed DnD campaign and could really use the music to spook out my players! Thanks, cheers!
There is a good ending, when you summon the demon king let the Templar’s live and they will attempt to kill the demon king and once they kill the demon king get the good ending
i'm a little late but it is possible to kill the demon king but you need to not kill any templars get the thing that lets you gain points from the infected, get defiance (note it's a good idea to have a lot of people infected before you do this) then summon him after he is summoned just go where he goes and then boom good ending. as for other ways i'm not sure you could probably do the same thing but kill all the templars super early and upgrade to free will (but probably not to defiance) then just kill him and it might give you enough points for the demon king upgrade maybe.
You're suppose to fight the demon king.
Once he is summoned he takes the power to gather energy from the dead. However, if you gather energy from the living and gain defiance, you can increase blood rage, combat, teleportation, and flight, then you can chase him down and kill him ( his health is the cure %). The more living the easier the battle and the more time you have, the remaining templars will help defeat him as well. if you gain humanity's trust (devolve blood pact, stop killing and focus on infectivity instead of lethality) the templars will spare you. If you humanity still wants you gone, you can absorb ALL of the demon kings power and gain even MORE DNA from the dead, and eventually claim the throne. Both of these lead to a better score, since cure% will be 0
That last sounds fun
sérieusement !!!!
is there a vid where someone does it?
I really want some movie about this plague inc scenario where the daemon vampire wants to cleanse humanity and he wants to gain their trust do defeat the daemon king by making a UA-cam channel and blows up but he grows to love his viewers and instead of killing them he wants to help them so when he summons the daemon king he gives a bunch of guns to his fans and empowers them with daemonic energy without corrupting them and attacks the daemon king and when he kills the daemon king he takes his throne and becomes a daemon king and ruler of humanity and makes a galactic empire
Fell asleep while watching your videos, left autoplay on. Woke up seconds before “kill the people of Canada for a minute.”
Guess who’s Canadian and almost had a heart attack?
Diofeliz LOL
Diofeliz thought this was a roast at first
Ummmm me too...
XDD
sorry, cant guess, who?
I thought the title was "Plague Inc: Custom Scenarios - Harold the Demon King"
Don't hide the pain 😂
That's my fucking little cousin's name
@Rycupcakes 7783 agreeable, I suppose
Me too
I didn’t realize that it wasn’t that name before I saw this comment
6+ billion people on the planet, that's a DNA cap of 6+ million, which would let you get the demon throne since it's only 99k. When you summoned the Demon Overlord it didn't take away all of your points, you went from 9120 to 908, starting the summoning ritual at 107k would be enough, unless it takes more points away the more you have.
Edit: Unless it lets you buy it prior to summoning in which case that would be easy
he lost points since once the summoning starts you can only get DNA cap from the infected, not the dead, it was just the pool adjusting to the lower cap. To win you have to stay low on killing, so you can have enough infected once the ritual starts.
Roberto De Gasperi 3:50 watch this clip over and reread what you posted. It is based on the dead.
@@ByteSizedGamer Mainly it is, but if you read the desciptions of the ability you discover that there's one that gives cap per infected, despite not as much. And when you summon the demon you lose the cap given by the dead. That's why I think you need to kill as little as possible and infect everyone to be able to get that true ending, since that upgade is the only way to get DNA cap after you do the summoning.
Roberto De Gasperi ah. I see.
You are supposed to kill the DK for that
I don’t know how much sense it would make, but if you made a sort of mini video in which you activated cheats just see what happens if you fight the Demon Lord, it might be interesting. I would watch it
or even just infect everyone to see what happens
Yes both of you
Good idea I am going to try this myself
Alexander Gorokhovsky I know the cheats
Search up "indigofenix herald of the demon king good ending"
I love how this scenario makes devolving a useful mechanic. That’s amazing!
I think after beating every base game plague type on Mega Brutal he can use the built in cheats.
I mean you can use them if you don't want the disease to be noticed yet the symptom is mutated
@Eros Matthew Montallana IndigoFenix, not Felix.
It is useful on virus
The DNA mechanics changes DNA from a resource to a level requirement. You must kill 102,000 people to unlock this ability. So neat.
15:26 I suspect energy vampirism increases your max DNA based on the number of infected
Justin Thompson It Does but by about 20%as much as a dead person
@@randomdude7052
Can someone do this again to see if you can defy the Demon King and destroy the Templars early?
You know what would be cool? A mode where you can fight *as* the Templar *against* the Shadow Plague. I know it would probably take a lot of work, but it would be pretty cool if they introduced it into the game.
Here, you can fight alongside the templar against the demon king but it's not really the same
@iytdominotikI also got a fun idea for a new sub gamemode of cure mode: Operation Plague inc. It plays dimilar to standard cure mode. Heres the twist. A shadow organisation controls the disease and you have to take both the organisation and the disease down.
If you could find a way to over throw the demon king I'd LOVE to see that video
@Justin Yeh Which video?
Rleft Raft By the creator. Just search up herald of the demon king good ending
@@Shiba9870 Ok thanks
I would’ve started in Norway because you know... Herald of the Demon King sounds like a kickass Black Metal band
Plus their monarch is King Harald 😂
I think to get that demon throne ability you need to overthrow the king, and to do that i think you must attack the demon king as he feeds. Seems like the only logical way personally, maybe give it a shot Pravus
Doesn't work, he moves far too quickly and randomly. The DNA cap is enough to get that many points, it is 1 dna point added to the cap for every 1000 kills, with over 7 billion people in the world, that is 7,000,000,000 / 1000 = 7 million, more than enough to get that if you are powerful enough, needing only 1 billion kills and some patience if you don't have abilities that decrease the kill to soul efficiency.
@@wolfwhitefireThe Demon King starts at 50% (cure = health) and reaches his full power by traveling to and killing off what remains of humanity. So if you just don't summon him until YOU kill everything...
@@modothegreat108 Not really sure which part of my comment you are replying to, could you please clarify? Your comment as is doesn't really seem related to what I said, unless you are theorizing that it might be possible to kill everyone off before summoning him and then it might be possible to challenge him or something.
@@wolfwhitefireThe Demon Lord is summoned when you get a specific research and return to a base, so there's no reason it shouldn't be possible to wipe out all of humanity without summoning him. And the Demon Lord seems to move around because he is attacking survivors one country at a time, so his movement would be limited if there's only 1 surviving country or none.
In addition, the Demon Lord has a health bar (replacing the cure bar) when summoned, which only really makes sense if you're expected to fight him.
@@modothegreat108 Yeah, I can see wiping out all of humanity without summoning him being possible, though their are limits to the creator and I think that usually ends the game no matter what else, but if it doesn't it might limit his movement not sure, for the cure bar I suppose that is possible, but I suspect it may be for something, possibly fighting the Demon Lord, that is only possible to do with that expensive symptom for overthrowing him.
Is it just me or does this give adrenaline to anyone watching this. This is so action packed and awesome
Also, someone call Simon Belmont
Need that power of christ infused spear lmao
I choose, instead, Alucard, Sypha, and Trevor Belmont
I like how you say, "So the good thing is 906 million people are dead!"
"Let's just sit back and murder the people of Canada for a little bit."
I may not actively WATCH some of your vids, but your voice is somehow... relaxing. I dunno why. Your voice seems to help me stay calm in high tension areas in games I play.
10:16 "unknown disease spotten in china"
2019-2020: indeed
Plague inc popped up as an update on my phone. I’ve since become obsessed with it again, to the point that I’m looking up UA-cam videos about it. Your videos are so much fun to watch! Thank you for all the work you’ve put into them! I’ve been binging, and I can’t wait to watch more! Thanks!
4:45 "The more people that are dead, the better" This cracks me up everytime XD
When You're so much of a Zelda fan that you thought it was a Ganon scenario
When you’re so much of a Dragonball fan and thought it was a Demon king piccolo scenario.
When you're so much of a skyrim fan you thought it was an Alduin scenario.
When you are so stupid that you can't understand this really good joke... (nothing personal)
@@sheol5123 Ganon, the main bad boss in The Legend of Zelda is usually referred to as the Demon King
@@fytos_ Uhh, I was referring to the others... I understand that Ganon is the villain and Ganon sounds like Canon, so it was a ganon(Canon) szenario
13:10
I'm just imagining a vampire, with an old Macintosh computer, reading a manual on how to set up an account (the book) and just having the name Vampire_1213 or I_Heart_Blood and just posting on Reddit: "Yeah so the Templar dudes are actually a group of bad guys who are just killing innocent people thinking they're vampires." and the place he's posting this on "r/templarictalk", then moments later he just has food in the microwave finish cooking. Then followed up with maniacal laughter as he eats his hot pocket. *What is wrong with my mind? XD*
was this supposed to be funny
depends on your sense of humour i guess but i honestly have no clue.
Lol I can imagine that
XD LOL
@@WizardCraft-ox4pe
ỳ
Indigofenix's scenarios have different endings and I am very interested on what all of those different endings
The only scenario that I have seen pravus completed by indigofenix is the spiral scenario (forgot the name)
There are 7 endings that count as a "victory".
1) Don't evolve Shadow Slaves and kill everyone before summoning the demon king
2) Turn everyone into shadow slaves before summoning the demon king
3) Don't evolve Shadow Slaves, summon the demon king and let him kill everyone without betraying him
3A) Letting the demon king kill everyone after evolving Shadow Slaves ends the game with a victory screen, but has no pop-up announcing an ending.
4) Defeat the demon king without raising your PR or evolving Shadow Slaves, then kill everyone
5) Defeat the demon king without raising your PR, then turn everyone into shadow slaves
6) Raise your PR and defeat the demon king, but have all Templars destroyed (either by you or the demon king)
7) Raise your PR and defeat the demon king, leaving at least one Templar alive (or not having the Templars set up at all if you raised your PR fast enough)
that is one of the most ambitious scenarios i've ever seen
pravus, could you try making your own maybe?
Can't like, sorry.
I'm assuming you have to go "Feast on the living" then you can start to raise your power and take over the king before he gets going.
Corona virus :*Exists*
UA-cam :Lets recommend this in everyone's recommendation
And it's about a bat...
Why doesn’t the demon king come and kill me like a real man, why does he need a herald... what is he some sort of SQUARE
Me equiped with holy water Guns and a cross: COME AND GET ME PUSSYYYYY
Hehe, Papa Nurgle will be proud of you. :D
23:24 this frame proves That The Demon King Is Yakko Warner
*B O T S W A N A*
Did anyone else read the title as “Harold the Demon King”?
You really wanna screw with the mechanics of this scenario? Drop on the double strain cheat. You can attack while being inactive and it totally gains you the DNA as you kill it's spectacular
Just a guess, I think if you devolve everything possible before he drains all of your DNA, you might have enough DNA with all the extreme cost of everything to purchase "The Throne of the Demon King", defeat him combat and take his place as dark commander of the world's souls. He asks if you are still his servant, and that he will kill you if you get in his way so hints combat is possible, and the description of the ability states "there can be only one".
see i reakon based on how the wording of the demon king showing up, that if you are blood rageing in the same country as him with free will and defiance you fight him, and once he is killed you can take the throne
"But the good news is 936 million people are dead."
-Pravus, 2019
I read Herald of the demon king as “Harold the Demon King”
I thought it was funny
this guy is seriously too good at voice acting
Pravus Gaming, have you considered making an achievement guide for Plague Inc: Evolved ?
Think you Could try and beat the demon king? im curious what happens.
*How dare you embrace this unholy enemy!*
What is this heresy comrade!
Now this is how the world would react to such an invasion. No few thousand dollars given to one to three based, but mass pooling of resources at Carte Blanc(sp).
Idea: Pravus makes a scenario.
the description could be a refference to altered beast "rise from your grave"
"The more people that are dead, the better" I LOVE THAT PART
*says something relatively simple* "DO YA GET IT YET?!?!??!!??"
No.... Explain please.
Of course the last aggresive upgrade is called Dynamic Entry, the pinnacle of offensive moves.
You started by eliminating t-series
Not Sands Underman what I though
This scenario was super awesome, please make one more try if needed on cheats to see what will happen if you pick that one symptom or infect all the world. Maybe you can fight this herald and bhecome a new one.
"The more people that are dead, the better"
Damn... haven't heard that in a while
To make the demon king vanquish, you must still have some templar in order for them to kill the demon king without killing you.
15:51 "im out of DNA because i ran out"
I have a scenario to suggest! It's called: The Reaper's Revenge. By TheChocoboLover! Please play it, although it might be bad...
"Im out of DNA because im out
of course the Templar set up in Jerusalem XD
DEUS VULT DEUS VULT DEUS VULT
Comrade doggo
@@completelyinsane797 Yes comrade
everybody at 3 am in spain: ZZZZZzzz
me: THE DEMON KING RISES IN SPAIN!!
Im from India, thanks for starting from India, makes me proud 🥲
"I want to get as many kills as possible"
-Words of a serial killer
The demon king must of had a emotional rollercoaster while watching this
Even for a professional this game gets challenging
The last part seems to suggest you must rebel against the demon king?
I like Plague inc. I want you to create more about this content. Thanks
Lol when you explain "consuming DNA Pts", u make it sound bad until it started happenin' 😂 my mind is like "Ooooohhh"
Pravus: s now we're gonna go templar hunting
Me: the assassin's of assassin's creed is on your side then
Oh I’m out of dna. Two seconds later has 1800 dna
I Love this scenario, it inspired me to make scenarios, does this guy make newer types of scenarios like this one?
I dont have a Discord account, but will you please play my Cholera scenario?
Would recommend you get an account, not too much trouble to make. The community it so friendly, maybe I will get to welcome you into the cult
@@medicustemporis6185 i can go on discord right now and find people spamming porn and the n-word
SlewedBoot25934 I feel like the real problem is the moderation, such as unusually toxic furry moderator that banned Quackity for no valid reason
@@danii8168 true
This scenario is so, so frickin' cooooool. Holy hell.
Hey Pravus!
I am subbed and a daily watcher, and my friend watches every once and a while. A little bit ago, he made a plague Inc custom scenario called footballfans or football fans (I forgot) and his user is funnystuff. I would love it if you could play it. It's hard on the harder modes, but easy on the easier ones.
Thanks for reading
how impressive! you are so GOOD in this game you're eligible to be a doctor
He isn’t
templares: yo this virus kinda bad im just gonna develop a cure n' sh-
pravus, and his handy dandy regenerating DNA: *n o .*
I’ma do some calculation 7.7billion=770,000,000, you will get 770,000 minimum points
And since he got up to 9120 points, I think it's safe to say that IT'S OVER 9000!!!!!!!!!!
14:45 If the Templar are setting up base that fast, why are you playing on maximum speed?
*D O Y O U G E T I T Y E T ?*
Pravus is summoning the demon king?
*dials phone*
Hello, Doom Slayer?
AAAWWW HEEELLLL NAAAHHH
*DIALS DOOM SLAYER NUMBER* DOOM SLAYER? YEAH I WANNA TELL YOU THAT THE DEMONS ARE GONNA INVADE AGAIN
you're on normal.. but tbh i probably couldnt beat it on casual lol
Now i wonder if there is a scenario where u play as the templars instead
Hail pravus and his weird stuff
Yay.................
Yay.
Fatty Tan you don’t say ‘hail pravus’ you say ‘Praise Pravus’
@@aknowleadge4787 fine...
Praise Pravus!
Yay....(why do I do this again)
Pravus, you should play Rebel Inc. It's from the same guys from Plague Inc. It's really cool and I think you would like it. :P
**spawns demon on India**
*pewdiepie wants to know your location*
woulda been nice to have been able to somewhat read what the evolutions do without having to pause within half a second for every one
Blasting Templar Bases reduces cure research, that’s been a part of Shadow Plague since it came out.
When you see ppl making coronavirus jokes and relate heavily only to realize the comments were written 11 months ago 😀
Your ending song is great, by the way.
0:39
He sounds like Count Olaf from A Series of Unfortunite Events
Bro, has anyone ever told you your voice sounds amazing?
You have to pay attention to your reputation. You actually can get countries to like you and welcome you, there are good endings too. This relies on Free Will and Energy Vampirism so you can get DNA once the demon king arrives. After he does you actually can fight him and kill him, but itll be hard. There are 3 endings after killing the demon king and id love for you to revisit this scenario and try to get one or all of them, the guide i found in google is really helpful as well
"The more people dead, the better"
as soon as i saw that it was a indigofenix creation i knew it was going to be good
Does anyone or +Pravus Gaming know what music is used for the game? I'm doing a vampire themed DnD campaign and could really use the music to spook out my players! Thanks, cheers!
You sounded like an oblivion reading out the scenario.
I saw this video and had flashbacks to doom and said time for a crusade
There is a good ending, when you summon the demon king let the Templar’s live and they will attempt to kill the demon king and once they kill the demon king get the good ending
"...the good thing is 936 million people are dead."
@The chostkille No, it's Plague Inc.
This is basically modified shadow plague. I mean, for a second there, I thought it was
Dad that purple corduroy got you drippin like gunna
Vampires can rule the world but we rule the world because of the most beautiful thing that is memes
Imagine the infinite dna cheat strain in this scenario.
Could you upload the blind take of the scenario think it would be cool to watch
I wonder if you can play this on mobile. I would definitely play.
i'm a little late but it is possible to kill the demon king but you need to not kill any templars get the thing that lets you gain points from the infected, get defiance (note it's a good idea to have a lot of people infected before you do this) then summon him after he is summoned just go where he goes and then boom good ending. as for other ways i'm not sure you could probably do the same thing but kill all the templars super early and upgrade to free will (but probably not to defiance) then just kill him and it might give you enough points for the demon king upgrade maybe.
*slow heavy metal music starts playing*
Liked for that narration voice ;)