Amethystone

"Amethystone is the cortex of implacability and rootedness. I've unlocked two stones already, this will be my third. I wonder what it wants from me?" - from the journals of Feye Lyne

Mechanics & Inner Workings

The Amethystone revealed her mind to Feye Lyne prior to the Rumble King's Confrontation and persuaded her to stand up and not let the Rumble King push her around. Upon Feye Lyne's victory, Amethystone congratulated her and unlocked Investiture of Stone.