Zeph, Corpse Recycler

Menace
Whenever a non-token creature dies, create
a Bone token.
(It's an artifact with, "{t}, sacrifice this artifact:
create a 1/1 black Skeleton creature token.")
Skeleton creatures you control get +2/+0 and
gain, "You may play this creature from your graveyard by paying its mana cost, it enters the battlefield tapped."