From Pathfinder Society Scenario #1-24: Lightning Strikes, Stars Fall, which isn't enabled.

Numerian Steel Breastplate

ITEM 10

RARE

Price 900 gp

Bulk 2

Category medium

Group plate

AC Bonus +4

Dex Cap +1

Strength +3

Check Penalty −2

Speed Penalty −5 ft.

This +1 resilient breastplate is constructed from the salvaged armor plating of one of Numeria's large robots. It protects the wearer from harsh elements and common laser fire, granting the wearer fire resistance 5.

Activate command

Frequency once per day

Effect You activate the remnants of mysterious technology within the breastplate to encase yourself in an electric field. For 1 minute, adjacent creatures that hit you with a melee Strike, as well as creatures that touch you or hit you with an unarmed attack, take 1d10 electricity damage per hit.

Pathfinder Society Scenario #1-24: Lightning Strikes, Stars FallOGL