You have learned much from tinkering with ancient technology.
Choose one of the following skills: Disable Device, Knowledge (engineering), or Use Magic Device. Once per day, you can reroll a check with that skill before the outcome of the check is revealed. You must take the second result, even if it is worse.
Pathfinder Player Companion: Blood of the Ancients © 2018, Paizo Inc.; Authors: John Compton, Andrew Hoskins, James Jacobs, Mikko Kallo, Alex Riggs, Stephen Rowe, and Jeffrey Swank.