Shadow Balance

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 when your opponent Summons a monster. If there are more monsters on your opponent's side of the field than your side, select and destroy a number of your opponent's monsters so that your opponent controls the same number of monsters as you.

In other media

Page	Medium	Debut date
Devil's Scales (manga)	Manga	2000-02-28