D/D Extra Surveyor

You can discard this card; add 1 face-up "D/D" Pendulum Monster from your Extra Deck to your hand, except "D/D Extra Surveyor". If this card is banished: You can banish the top cards of your opponent's Deck equal to the number of face-up Pendulum Monsters in their Extra Deck, then you can make 1 "D/D" monster you control gain 200 ATK for each card banished. You can only use each effect of "D/D Extra Surveyor" once per turn.