Source Drift Crisis pg. 45
Level Required 14
As a move action, you channel the Negative Energy Plane’s power directly into your solar flare or solar weapon, helping you capture and convert your escaping life energy into deadly force. As a reaction when you take damage that causes you to lose at least 2 Hit Points, the next successful attack you make with your solar flare or solar weapon before the end of your next turn deals additional cold damage equal to half the number of Hit Points you lost. Undead creatures are immune to this additional cold damage.
If you’re attuned or fully attuned, whenever you use this revelation’s reaction to add cold damage to your next attack, your solar flare or solar weapon also gains the penetrating weapon special property until the end of your next turn.
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