Knurv, Ceaseless Nightmare

Whenever a creature you control enters the graveyard from the battlefield, you may pay life equal to its mana cost plus two. If you do, return it to the battlefield tapped under its owner's control.

At the beginning of your end step, if you lost life this turn, make a Meeb token. (Meeb tokens are artifacts with
"{t}, Sacrifice this artifact: Add one mana of any color.")

"If you've already thought its name, it knows yours too."—Monster Handler Matt