Prismatic Barrier (Pathfinder Spell)
From D&D Wiki
School evocation; Level sorcerer/wizard 4
Casting Time 1 standard action
Components V, S, F (a prism)
Duration 1 round/level
Saving Throw Fortitude negates (see text); Spell Resistance no
You become covered by a thin yet resilient veil of bright, shifting colours; when struck, the barrier releases a flash of brilliant light. You have cover from melee and ranged attacks, and any creature that successfully makes a melee attack against you must make a Fortitude saving throw or become blinded for the duration of the spell. Creatures that do not rely on sight ignore the cover from this spell.