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When this card is Normal Summoned: You can target 1 DARK "Vampire" monster in your Graveyard; Special Summon that target in face-up Defense Position. When this card is Special Summoned: You can declare 1 card type (Monster, Spell, or Trap); your opponent sends 1 card of that type from their Deck to the Graveyard. You can only use this effect of "Vampire Duke" once per turn. This card cannot be used as an Xyz Material for an Xyz Summon, except for the Xyz Summon of a DARK monster.