Deathcrawl

Deathcrawl is an undead (revanent) green dragon the party encountered in the Underdark during Episodes 26-27. The party found the dragon in his lair and defeated him. However, after he claimed to be immortal and has likely moved to a new body, as he is a revenant and cannot be destroyed until his revenge is complete. 
Deathcrawl killed Deacon in the battle, though Barkley revivified him. 
== Appearance ==
Deathcrawl is described as a smaller green dragon, probably young, with his wings ripped away. His neck and stomach are ripped open exposing bone, flesh, and the dragon drags its viscera along the ground behind him.
== Background ==
We don't know much about Deathcrawl at the moment, but we know that he were once involved in some sort of altercation with Moira in which he stole their lair from the larger green dragon - which somehow led to her being locked in the basement of the alchemist Merlin LaRoth.
Deathcrawl was originally slain by a paladin of Pelor. However, the paladin died of natural causes before the revenant dragon could kill them.Now Deathcrawl continues to "live" on, with the goal of murdering all of the paladin's descendents. It is not known who any of those descendents might be. 
Deathcrawl also does work in affiliation with his mother, Tanith in addition to the Cult of The Dragon.