Blinding

Price: +1 Bonus
Property: Shield
Caster Level: 7th
Aura: Moderate; (DC 20) evocation
Activation: —
A shield with this ability flashes with a brilliant light up to twice per day upon command of the wielder. Anyone within 20 feet except the wielder must make a DC 14 Reflex save or be blinded for 1d4 rounds.
Prerequisites: Craft Magic Arms and Armor, searing light
Cost to Create: Varies

Source: Dungeon Master's Guide