Mirror Bind

Card type	Monster
Attribute	TRAP"TRAP" is not in the list (DARK, DIVINE, EARTH, FIRE, LIGHT, WATER, WIND, ?, ???, THUNDER, ...) of allowed values for the "Attribute" property.
Activate only if you control a face-up "Silver Spirit - Ukyo" and "Silver Spirit - Sakyo" when an opponent's monster declares an attack. Destroy the attacking monster, then destroy all monsters your opponent controls with a lower ATK than the destroyed monster's.

Yugipedia β