Dark Magic Amulet

You can activate this card the turn it was Set by revealing 1 Spellcaster monster in your hand. (1) When a monster effect is activated in response to the activation of a card that mentions “Dark Magician” or its effect: You can negate that effect, and if you do, for the rest of this turn, the activated effects of monsters with the same original name are negated. (2) If you Special Summon “Dark Magician” while this card is in your GY: You can pay 2500 LP; Set this card.