Javier, the Corpse Crafter

Whenever a player sacrifices a nontoken creature,
you may pay X life, where X is its mana value. If
you do, create a copy of it, except it's a black
Zombie artifact creature. It gains decayed.
{t}, Sacrifice X artifacts and/or creatures: Exile
target artifact or creature card with mana value X
from a graveyard. Create a token that's a copy of
it, except it's a 2/2 black Zombie artifact creature.
It gains decayed.