Abomination

The Abomination replaces Patch Werk after you have defeated him. It walks towards the player to deal contact damage. Upon death, it splits into a Grave Limb and Severed Legs. It does not drop special loot, and only serves to add variety to the Blood Moon enemies.

Spawn
Abominations spawn during a Blood Moon in Pre-Hardmode or Hardmode if Patch Werk has been defeated in that world.