Zac, the Bioweapon

Zac, the Bioweapon, enter's with 4 +1/+1 counters on it.
Whenever Zac would take combat damage, instead remove a +1/+1 counter from Zac
and create a 1/1 Ooze horror creature token.
Whenever another Ooze dies, put a +1/+1 counter on Zac.