PFSRD:Weapon Of Awe
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Weapon of Awe
School transmutation; Level cleric 2, inquisitor 2, paladin 2
Casting Time 1 standard action
Components V, S, DF
Target weapon touched
Duration 1 minute/level
Saving Throw Will negates (harmless, object); Spell Resistance yes (harmless, object)
You transform a single weapon into an awe-inspiring instrument. The weapon gains a +2 sacred bonus on damage rolls, and if the weapon scores a critical hit, the target of that critical hit becomes shaken for 1 round with no saving throw. This is a mind-affecting fear effect. A ranged weapon affected by this spell applies these effects to its ammunition.
You can't cast this spell on a natural weapon, but you can cast it on an unarmed strike.