Angelic Exaltation 
Enchantment
Whenever a creature you control attacks alone, it gets +X/+X until end of turn, where X is the number of creatures you control.
Legality
standardNOT LEGALpioneerLEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL
Enchantment
Whenever a creature you control attacks alone, it gets +X/+X until end of turn, where X is the number of creatures you control.