Balduvian Hydra [Ice Age]

Balduvian Hydra enters the battlefield with X +1/+0 counters on it.
Remove a +1/+0 counter from Balduvian Hydra: Prevent the next 1 damage that would be dealt to Balduvian Hydra this turn.
RRR: Put a +1/+0 counter on Balduvian Hydra. Activate only during your upkeep.