Power word, blind

Power word, blind is a conjuration spell that blinds 200 HP worth of creatures..

Effect
This spell creates a wave of magical energy that blinds one or more creatures. It affects the creatures with the lowest hit point totals first, selecting subjects one at a time until the next target would put it over the limit of 200. (Creatures with negative hit points count as having 0 hit points.)

The duration of the spell depends on the total hit points of the affected creature(s):
 * Up to 50 HP: Permanent
 * 51 to 100: 1d4+1 minutes
 * 101 to 200: 1d4+1 rounds