The way Daidragon is worded, I think it can indeed use it's power skill. Different from other cards that say _"when your other unit is attacked"_ it says _"when your vanguard is attacked"_ so it still could tribute itself, denying Kaiser's on hits lol.
![Dragheart, Luard vs Alter Ego Messiah [Cardfight Vanguard D Format Playtest October 21, 2024]](http://i.ytimg.com/vi/UpU4jkfYLOw/mqdefault.jpg)
The way Daidragon is worded, I think it can indeed use it's power skill.
Different from other cards that say _"when your other unit is attacked"_ it says _"when your vanguard is attacked"_ so it still could tribute itself, denying Kaiser's on hits lol.
Grhyaundra vs Daiyusha!
Quick Observation: The Daiyusha player got a heal but didn't remove a damage from damage zone in minute 6:00