Kandra Blessing spike

The Kandra Blessing spikes, consisting of four removable hemalurgic spikes, represent the core mechanism enabling kandra to shapeshift by storing their consciousness, distinguishing them from their koloss cousins. Introduced as ancient artifacts from the Lord Ruler's era in The Well of Ascension, they become pivotal in The Hero of Ages when TenSoon uses his to impersonate his master, sparking the kandra rebellion against their Contract. Their removal proves fatal, underscoring the kandra's vulnerability and driving the species' ultimate sacrificial role in preserving Scadrial's future.