Graveseer Abyssal Matriarch

2+ DARK monsters Must be Fusion Summoned. When Fusion Summoned: You can target up to 2 cards your opponent controls; send them to the GY. Once per turn (Quick Effect): If a monster(s) is sent from your Deck to the GY: You can negate the effects of 1 monster your opponent controls until the end of this turn. If this Fusion Summoned card is sent to the GY: Mill 3 cards, then add 1 “Graveseer” monster from your GY to your hand.