Gravitational Shift 
Enchantment
Creatures with flying get +2/+0. Creatures without flying get -2/-0.
Legality
standardNOT LEGALpioneerNOT LEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL
Enchantment
Creatures with flying get +2/+0. Creatures without flying get -2/-0.