Zac, the Secret Weapon

Trample
Zac, the Secret Weapon enters with X +1/+1
counters on it.
Whenever you gain life, put two +1/+1 counters
on Zac, the Secret Weapon and draw a card.
Whenever you lose life, remove two +1/+1
counters from Zac, the Secret Weapon and create
a 1/1 green and blue Ooze creature token with
"{2}, Sacrifice this creature: You gain 2 life."