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 - $1.50
Lightly Played - $1.25
Moderately Played - $1.00
Heavily Played - $1.00
Damaged - $0.75
Near Mint Non-English - $1.50
Lightly Played Non-English - $1.25
Moderately Played Non-English - $1.00
Heavily Played Non-English - $1.00
Damaged Non-English - $0.75