Rock Hydra enters the battlefield with X +1/+1 counters on it. For each 1 damage that would be dealt to Rock Hydra, if it has a +1/+1 counter on it, remove a +1/+1 counter from it and prevent that 1 damage. {R}: Prevent the next 1 damage that would be dealt to Rock Hydra this turn. {R}{R}{R}: Put a +1/+1 counter on Rock Hydra. Activate only during your upkeep.
Near Mint - $98.10
Lightly Played - $78.50
Moderately Played - $68.70
Heavily Played - $58.90
Damaged - $49.10
Near Mint Spanish - $98.10
Lightly Played Spanish - $78.50
Moderately Played Spanish - $68.70
Heavily Played Spanish - $58.90
Damaged Spanish - $49.10