From Pathfinder Treasure Vault (Remastered), which isn't enabled.

Energizing Lattice

ITEM 13

LIGHT

Price 3000 gp

Bulk 2

Category medium

Group chain

AC Bonus +4

Dex Cap +1

Strength +3

Check Penalty −2

Speed Penalty −5 ft.

This suit of +2 resilient fortification lattice armor has latticework of fine golden wire. After negating a critical hit with its fortification rune, the latticework glows for 1 minute, shedding bright light in a 20-foot radius (and dim light for the next 20 feet). You can Dismiss this light.

Effect: Energizing Lattice

Activate (concentrate, force)

Requirements The energizing lattice is glowing because it negated an enemy's critical hit

Effect You release the lattice's energy and make a weapon or unarmed attack Strike that deals 6d6 additional force damage. If your Strike fails, but doesn't critically fail, the target still takes half the force damage. The latticework ceases glowing after the Strike.

Pathfinder Treasure Vault (Remastered)ORC