The Metalwood Saga / Reference Guide

Full-series spoilers

Soulbreak

Soulbreak is identified by Lorelei as one of the darkest and most severe of the Fourteen Gifts of the Soul. While the exact combative mechanics of this specific power are shrouded in mystery, it is closely tied to the grim reality that a person's mind must be "utterly broken" through immense pain before they can truly open themselves up to the deeper depths of soulmagic. Lorelei explicitly notes that her sister Cariel (Magona) endured this horrific breaking process, an agonizing trauma that ultimately transformed her into one of the most ruthless and powerful soulmages in existence.