Summon: Leviathan

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.) I — Return each creature that isn't a Kraken, Leviathan, Merfolk, Octopus, or Serpent to its owner's hand. II, III — Until end of turn, whenever a Kraken, Leviathan, Merfolk, Octopus, or Serpent attacks, draw a card. Ward