You learned a secret, awe-inspiring attack that has become your signature.
Benefit: Once per day, with any weapon with which you have Weapon Focus, you can choose to channel great power into a single attack as a standard action. The attack, if successful, inflicts damage as if the weapon inflicted a critical hit—even if striking a foe normally immune to critical hits. If the finishing attack inflicts an actual critical hit, double the weapon’s critical multiplier. If the finishing move attack misses, the ability is still considered used for that day. A finishing move still triggers special effects that occur only when a critical hit occurs, such as the decapitating power of a vorpal weapon.