Diffusion Wave-Motion

Speed Duel: Arena of Lost Souls · Single card

(This card is not treated as a "Fusion" card.) If your opponent controls a monster: Pay 1000 LP, then target 1 Level 7 or higher Spellcaster monster you control; this turn, it must attack all monsters your opponent controls once each, also other monsters you control cannot attack. The effects of monsters destroyed by these attacks cannot activate and are negated.