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From Pathfinder Lost Omens Pathfinder Society Guide, which isn't enabled.

Aeon Stone (Dusty Rose Prism)

ITEM 3
UNCOMMONINVESTEDMAGICAL
Price 50 gp
Usage worn
Bulk —

This aeon stone allows you to cast the 1st-rank Shield cantrip as an arcane innate spell, surrounding yourself in pink energy.

The resonant power increases the damage prevented by your aeon stone's shield spell from 5 to 10.

Pathfinder Lost Omens Pathfinder Society GuideOGL