Monsterology: Carceri

In the Dungeons & Dragons fantasy role-playing game, Carceri (more fully, the Tarterian Depths of Carceri; also, Tarterus or The Red Prison) is a neutral (chaotic) evil-aligned plane of existence. Let's take a tour around Carceri and learn about it's structure, purpose and notable inhabitants.
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As per usual, all artwork used is credited to the original artists and not the property of the TMG channel.