Glitterdust

This spell creates a cloud of glittering golden particles within the area of effect. Those in the area must roll a successful saving throw vs. spell or be blinded (-4 penalties to attack rolls, saving throws, and Armor Class) for 4 rounds. In addition, all within the area are covered by the dust, which cannot be removed and continues to sparkle until it fades. Note that this reveals invisible creatures. The dust fades in 4 rounds.