Rock Hydra [Unlimited Edition] Theros Set: Arabian Nights Type: Creature

Set: Arabian Nights Type: Creature — Human Uncommon Cost: {U} Merchant Ship can't attack unless defending player controls an Island

Set: Fourth Edition Type: Creature — Goblin Rare Cost: {1}{R}{R} Other Goblin creatures get +1/+1 and have mountainwalk

Gitaxian sective

Set: Fifth Edition Type: Enchantment Rare Cost: {R}{R} Players can't untap more than one creature during their untap steps

Some are filled with water

Rock Hydra [Unlimited Edition] Theros Set: Arabian Nights Type: CreatureSet: Unlimited Edition Type: Creature Hydra 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.