Zzzyxas's Abyss 
Enchantment
At the beginning of your upkeep, destroy all nonland permanents with the first name alphabetically among nonland permanents.
Legality
standardNOT LEGALpioneerNOT LEGALmodernNOT LEGALlegacyNOT LEGALvintageNOT LEGALcommanderNOT LEGAL