Ruby Spere Aeon Stone

Attune Crystal (physical; 1 Success) DC 15 Arcana, Nature, Occultism, or Religion (trained) Countermeasures (2 Failures) You think you've succeeded, but attempting to use the improperly attuned crystal activates an alarm; Notice DC 15 Crafting or Perception; Disable DC 16 Stealth or Thievery --- Success You attune to the crystal and can use it to control the doors, sentry turrets, and alarms inside the prison.