Gravity Well 
Enchantment
Whenever a creature with flying attacks, it loses flying until end of turn.
Legality
standardNOT LEGALpioneerNOT LEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL
Enchantment
Whenever a creature with flying attacks, it loses flying until end of turn.