Rock Hydra [Limited Edition Alpha] Fire[+20] If the target attacks

If the target attacks

Set: Planar Chaos Type: Enchantment Rarity: Uncommon Cost: {2}{R}{R} At the beginning of the end step

Set: XY: Generations Type: Grass Rarity: Ultra Rare Retreat cost: Colorless

They found something far greater

Rock Hydra [Limited Edition Alpha] Fire[+20] If the target attacksSet: Limited Edition Alpha Type: Creature Hydra Rarity: Rare Cost: {X}{R}{R} 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.