Deadly Precision
Every enemy has a weak point. After much study, you've finally discovered the vulnerabilities in enemies that most people wouldn't have the skill to exploit.
Prerequisites: Knowlege (Dungeoneering) 10 Ranks, Knowledge (Planes) 10 Ranks, or Knowledge (Religion) 10 Ranks
Benefit: You can deal precision damage to enemies that are normally immune to precision damage. The kinds of enemies you can use this feat with depends on which skills you have ranks in. If you have 10 ranks in Knowledge (Dungeoneering) you can deal precision damage to oozes, if you have 10 ranks in Knowledge (Planes) you can deal precision damage to elementals, and if you have 10 ranks in Knowledge (Religion) you can deal precision damage to incorporeal enemies.
Normal: Oozes, elementals, and incorporeal enemies cannot be damaged with precision damage.