During either player's turn, when a Spell/Trap Card, or monster effect, is activated that includes an effect that Special Summons a monster(s): You can detach 1 Xyz Material from this card; negate the activation, and if you do, destroy that card, then you can make this card and 1 other "D/D" monster you control gain 1800 ATK, until the end of this turn. If this card is sent from the field to the Graveyard: You can add 1 "Dark Contract" card from your Deck to your hand.