Spreading Plague 
Enchantment
Whenever a creature enters, destroy all other creatures that share a color with it. They can't be regenerated.
Legality
standardNOT LEGALpioneerNOT LEGALmodernNOT LEGALlegacyLEGALvintageLEGALcommanderLEGAL
Enchantment
Whenever a creature enters, destroy all other creatures that share a color with it. They can't be regenerated.