Thistledown Duo 
Creature — Kithkin Soldier Wizard
Whenever you cast a white spell, this creature gets +1/+1 until end of turn. Whenever you cast a blue spell, this creature gains flying until end of turn.
Legality
standardNOT LEGALpioneerNOT LEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL