Aquaman, King of Atlantis

Vigilance, Hexproof
Whenever you cast a Fish, Shark, Serpent, Kraken, or Leviathan spell, you may search
your library for a spell with the same creature
type and lesser mana value and put it onto the field. Shuffle your library afterwards.
{t}: Add {w}{u}{g}. Spend only to cast Fish, Serpent, Kraken, and Leviathan spells.