Piece of Undead
This gruesome limb once belonged to one of Zhaitan's undead minions. The asura harvesting team can use this body part for experiments.
— In-game description
Piece of Undead is an event item for the event Gather corpse parts from undead for asuran experiments in Murkvale in Mount Maelstrom. Each one turned in will also give 1% heart progress.