Sporespawn Phytohydra

{x}{b}{g}, Sacrifice a creature: Put X +1/+1 counters on Sporespawn Phytohydra
When Sporespawn Phytohydra dies, create a 1/1 black and green Plant Zombie creature token for each +1/+1 counter on it.
If you're lucky, it'll just be an extra head.