Prohibited Power Patron Portal - Terminus

Send 1 "Power Patron" monster from your Deck or Extra Deck to the GY, then you can add 1 DARK Fairy monster from your Deck to your hand, also you cannot declare attacks this turn, except with "Power Patron" monsters. At the start of the Damage Step, if your "Power Patron" monster battles an opponent's monster: You can banish this card from your GY; banish that opponent's monster face-down. You can only use each effect of "Prohibited Power Patron Portal - Terminus" once per turn.