Rock Hydra [Alpha Edition] SL6 or Effect Monster's effect that

or Effect Monster's effect that targets a card(s) on the field and destroy it

Set: Platinum: Arceus Type: Darkness Rarity: Rare Retreat cost: Colorless

• 3 Sword & Shield: Darkness Ablaze booster packs

but it explains much

Set: EX: Hidden Legends Type: Grass Rarity: Ultra Rare Retreat cost: Colorless

Rock Hydra [Alpha Edition] SL6 or Effect Monster's effect thatSet: Alpha Edition 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 only during your upkeep.