Tomie Kawakami

{t}, Sacrifice a creature: Gain control of target creature an opponent controls. For as long as
you control that creature, it has "Whenever this creature attacks for the first time each turn,
sacrifice it at the beginning of the next end step."
Whenever Tomie dies for the first time each
turn, create a 0/0 black Germ creature token
with "This creature gets a +1/+1 for each
creature you control but don't own."