Rover, Water Warden

Whenever Rover enters the battlefield, you may return target creature you control to its owner’s
hand.
Tidal Surge — {1}{u}, {t}: Create a 1/1 blue Elemental creature token with flying. Activate this ability only if you control another Elemental.
Waveform Shield — {2}{u}: Until end of turn, creatures without flying or islandwalk can’t attack.
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Rover knows every current and eddy, guiding lost souls back to shore.