Tanya, Queen of the Ocean

+2: Search your library for a Kraken, Merfolk, Serpent, Leviathan, Fish, Siren, or Tentacle card and put it on the battlefield tapped.
-2: Make a token copy of target Kraken, Merfolk, Serpent, Leviathan, Fish, Siren, or Tentacle you control.
-7: Put all Krakens, Merfolks, Serpents, Leviathans, Fish, Sirens, or Tentacles in graveyards onto the battlefield under your your control.