Revenge Poena

Revenge Poena ((復讐のポイネ Fukushū no Poine) was a dryad. She was a formless entity that could possess human bodies. She possessed the dead body of Deathmask, after his death during the ribellion of Saga and renomimated herself as Punishment Death Mask  (懲罰デスマスク Chōbatsu desumasuku). She fought against Cassiopeia Erda that managed to defeat the dryad and killed her with the help of the soul of Deathmask.