Overtaker 
Creature — Merfolk Spellshaper
, 
, Discard a card: Untap target creature and gain control of it until end of turn. That creature gains haste until end of turn.
Legality
standardNOT LEGALpioneerNOT LEGALmodernNOT LEGALlegacyLEGALvintageLEGALcommanderLEGAL