Negative Energy

Card type	Monster
Attribute	SPELL"SPELL" is not in the list (DARK, DIVINE, EARTH, FIRE, LIGHT, WATER, WIND, ?, ???, THUNDER, ...) of allowed values for the "Attribute" property.
Double the original ATK of all DARK monsters as long as they remains face-up on the field.

In other media

Page	Medium	Debut date
Negative Energy (manga)	Manga	1998-12-07