"Dark Magician" + "Buster Blader"
This monster can only be Special Summoned by Fusion Summon. As long as this card remains face-up on the field, you can negate the activation of 1 Spell Card and destroy the Spell Card by discarding 1 card from your hand. The ATK of this card increases by 500 points for each Dragon-Type monster on the field and in either player's Graveyard.