Perception Bobblehead (Serial Numbered) [Fallout] BT8-082 negate that activation

negate that activation

Set: Magnificent Mavens Card type: Normal Trap Rarity: Secret Pharaoh's Rare When an opponent's monster declares an attack: Destroy all your opponent's Attack Position monsters

Set: Sun & Moon: Black Star Promos Type: Colorless Rarity: Promo Retreat cost: 1

you may exert them to draw a card

Perception Bobblehead (Serial Numbered) [Fallout] BT8-082 negate that activationSet: Fallout Type: Artifact Bobblehead Rarity: Uncommon Cost: {3} {T}: Add one mana of any color. {3}, {T}: Look at the top X cards of your library, where X is the number of Bobbleheads you control. You may cast a spell with mana value 3 or less from among them without paying its mana cost. Put the rest on the bottom of your library in a random order.