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 this ability only during your upkeep.
Near Mint - $17.40
Lightly Played - $14.00
Moderately Played - $12.20
Heavily Played - $10.50
Damaged - $8.70
Near Mint Spanish - $17.40
Lightly Played Spanish - $14.00
Moderately Played Spanish - $12.20
Heavily Played Spanish - $10.50
Damaged Spanish - $8.70