Leviathan [Fourth Edition (Foreign Black Border)] Rogue Rat Set: Fallout Type: Legendary Creature

Set: Fallout Type: Legendary Creature — Bear Rarity: Rare Cost: {1}{G} Whenever another Bear enters the battlefield under your control

Sacrifice another Serpent or Squirrel: Choose one —

Set: Mercadian Masques Type: Enchantment Rarity: Uncommon Cost: {U} {3}{U}{U}: Shuffle your library

Set: Ixalan Prerelease Promos Type: Creature — Human Pirate Rarity: Rare Cost: {3}{R} {3}{R}: Gain control of target creature an opponent controls until end of turn

Leviathan [Fourth Edition (Foreign Black Border)] Rogue Rat Set: Fallout Type: Legendary CreatureSet: Fourth Edition (Foreign Black Border) Type: Creature Leviathan Rarity: Rare Cost: {5}{U}{U}{U}{U} Trample Leviathan enters the battlefield tapped and doesn't untap during your untap step. At the beginning of your upkeep, you may sacrifice two Islands. If you do, untap Leviathan. Leviathan can't attack unless you sacrifice two Islands. (This cost is paid as attackers are declared.)