Hydra of the Mutilated

Hydra of the Mutilated Enters the battlefield
with X +1/+1 counters on it.
Whenever a creature you control dies, you may
pay {g}. if you do put a -1/-1 counter on target creature.
When Hydra of the Mutilated is dealt damage,
you may pay {g}{g}. if you do put that many
+1/+1 counters on it