Grsila

Aquatic Agility: When Grsila enters the battlefield,
you may return up to two target creatures to their
owners' hands.
Amphibious (This creature can breathe underwater
and has islandwalk.)

Thunderous Punch: Whenever Grsila attacks,
you may pay 2UR. If you do, Grsila deals 2 damage
to each creature without flying.