Rock Hydra [Revised Edition] Elf Artificer Druid Set: Platinum: Arceus Type: Colorless

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

Set: Battle Pack 2: War of the Giants Card type: Continuous Trap Rarity: Mosaic Rare Special Summon this card as an Effect Monster (Rock-Type/LIGHT/Level 4/ATK 1000/DEF 1800)

Set: From the Vault: Transform Type: Creature — Human Werewolf Rarity: Mythic Cost: {2}{R}{G} Whenever this creature enters the battlefield or transforms into Huntmaster of the Fells

As Volrath's Motion Sensor enters the battlefield

Rock Hydra [Revised Edition] Elf Artificer Druid Set: Platinum: Arceus Type: ColorlessSet: Revised 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.