Your search for "Pernicious Deed 191" revealed the following:
Pernicious Deed (CNS) from Conspiracy, available at 401 Games Canada. Rarity: Mythic Rare Finish: Normal Artist: Christopher Moeller Card Text:X, Sacrifice Pernicious Deed: Destroy each artifact, creature, and enchantment with converted mana cost X or less.
Pernicious Deed (Foil) (CNS) from Conspiracy, available at 401 Games Canada. Rarity: Mythic Rare Finish: Foil Artist: Christopher Moeller Card Text:X, Sacrifice Pernicious Deed: Destroy each artifact, creature, and enchantment with converted mana cost X or less.