Favor of the Overbeing 
Enchantment — Aura
Enchant creature As long as enchanted creature is green, it gets +1/+1 and has vigilance. As long as enchanted creature is blue, it gets +1/+1 and has flying.
Legality
standardNOT LEGALpioneerNOT LEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL