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 - $31.60
Lightly Played - $25.30
Moderately Played - $22.20
Heavily Played - $19.00
Damaged - $15.80
Near Mint Spanish - $31.60
Lightly Played Spanish - $25.30
Moderately Played Spanish - $22.20
Heavily Played Spanish - $19.00
Damaged Spanish - $15.80