Rock Hydra [Collectors' Edition] Creature Sacrifice another creature: Untap Grimgrin

Sacrifice another creature: Untap Grimgrin and put a +1/+1 counter on it

Set: Alpha Edition Type: Artifact Rarity: Rare Cost: {2} {X}: You may choose a creature card in your hand whose mana cost could be paid by some amount of

Set: Tenth Edition Type: Creature — Spirit Rarity: Rare Cost: {3}{G}{G} Untap all permanents you control during each other player's untap step

Set: Zendikar Type: Enchantment — Aura Rarity: Rare Cost: {3}{W}{W}{W} Enchant creature

their controllers sacrifice them

Rock Hydra [Collectors' Edition] Creature Sacrifice another creature: Untap GrimgrinSet: Collectors' 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.