The Steadfast Keystone
Elios, a priest, devised this ritual to save Steadfast from undead, but Pathfinder Society agents finished the work after his death.
Parent page Divine Keystone
The divine keystone ritual first appears in the Pathfinder Society Adventure #4-02: Return to the Grave. This ritual was the invention of a gifted Acadamae wizard turned Pharasmin priest named Elios. He sought to protect Steadfast, a small settlement of refugees in the Gravelands, from oncoming hordes of undead under the control of a fallen Ivory Reaper. Unfortunately, Elios found that the Whispering Tyrant's influence was too great for a common consecration ritual. With the instructions Elios left before his own demise, the Pathfinder Society successfully imbued a keystone from Steadfast's old Pharasmin temple with the divine touch of Pharasma herself, sending a team of Pathfinders to bring it to the besieged town and rescue the refugees.