Healer to the Ash King (Dark Rulers, #5)

by Rebecca F. Kenney

“My grandmother used to say that a crystallized memory could stabilize magical resonance,” says the craftswoman, picking up the payment. “I have no idea what she meant. Where does one find a crystallized memory?” She laughs, testing the edge of a gold coin with her teeth. “Here, have one each.” She hands me two rings of polished petrified wood, one small and one large.