Bless Weapon, Swift

You invoke the holy words quickly. Your weapon flashes with a momentary blue-white radiance.

This transmutation makes a melee or ranged weapon (or 50 rounds of ammunition) strike true against evil foes. The weapon is treated as having a +1 enhancement bonus for the purpose of bypassing the DR of evil creatures or striking evil incorporeal creatures. The spell doesn’t grant an actual enhancement bonus. The weapon also becomes good-aligned, which means it can bypass the DR of certain creatures. This effect overrides and suppresses any other alignment the weapon might have.

Affected projectile weapons (e.g.: bow & crossbows) confer the benefit to the projectiles they shoot. All critical hit rolls against evil foes are automatically successful, so every threat is a critical hit. This last effect does not apply to any weapon that already has a magical effect related to critical hits, such as a keen weapon or a vorpal sword.