The Gygikitus Fungus

Symbiosis (At the beginning of each opponent's upkeep, that player chooses a creature they control. Then, you may put a +1/+1 counter on that creature. If you do, put a +1/+1 counter on this creature.)
Sacrifice The Gygikitus Fungus: Gain 3 life, draw a card, and create a 1/1 black Rat creature token.
Whenever a creature you don't control with a +1/+1 counter on it dies, return this creature from y