Crown of the Verdant Blight

This iron crown is woven from living thorns that never quite stop twitching, each barb slick with a faint sap-like sheen. At its center floats a fist-sized green crystal, cracked from within and lit by a sickly emerald fire. When the crown is worn, the thorns subtly lengthen and curl closer to the skull, while black tracery creeps along the wearer's temples and beneath the eyes like living ink. The air around it smells of rain on rot, and the crystal hums softly whenever lies are spoken nearby.