Your search for "Revoke Existence 28" revealed the following:
Revoke Existence (2XM) from Double Masters, available at 401 Games Canada. Rarity: Common Finish: Normal Artist: Adam Paquette Card Text:Exile target artifact or enchantment.
Revoke Existence (DDI) from Duel Decks: Venser vs. Koth, available at 401 Games Canada. Rarity: Common Finish: Normal Artist: Allen Williams Card Text:Exile target artifact or enchantment.
Revoke Existence (Foil) (2XM) from Double Masters, available at 401 Games Canada. Rarity: Common Finish: Foil Artist: Adam Paquette Card Text:Exile target artifact or enchantment.