Seasaurus, Predacon Envy

Islandwalk
Escape — {3}{u}{u}, Exile five other cards from your graveyard. (You may cast this card from your graveyard for its escape cost.)

Whenever Seasaurus deals combat damage to a player, tap target creature that player controls. It does not untap during its controller's next untap
step.
Triad with Landsaurus and Skysaurus.