The Proudwater Aquarium

The Proudwater Aquarium comes into play tapped unless you control two or more lands.
{t}: add {u} or {g}.
{3}{g/u}{t}: Search your library for a Kraken, Leviathan, Octopus, or Serpent creature card, reveal it, and place it into your hand.
{t} Sacrifice The Proudwater Aquarium: Put a Kraken, Leviathan, Octopus, or Serpent creature card from your hand onto the battlefield tapped.

"Welcome to my pet project."