Horus the Black Flame Dragon LV8 (SOD-EN008)

Cannot be Normal Summoned/Set. Must be Special Summoned by Horus the Black Flame Dragon LV6 and cannot be Special Summoned by other ways. During either player's turn when a Spell Card is activated: You can negate the activation and if you do destroy it. You must control this face-up card to activate and to resolve this effect.

Effect Monster, Soul of the Duelist