Full Orchestra the Music Fiend

[ Warrior / Fusion / Effect ] "Ensembullfighter the Music Fiend" + "Boton the Music Princess" [REQUIREMENT]Send 1 card from your hand to the Graveyard. [EFFECT] Destroy all face-down cards in your opponent's Spell & Trap Zone. Then, this card gains ATK equal to [the number of cards destroyed by this effect] x 600 until the end of this turn. ATK/ 2900 DEF/ 2900