Complex sentence: A short time later, Riveda tells Deoris that she must return to Domaris' care, but first performs one last Black Robe ceremony with her in a subterranean chamber, waking The Man With The Crossed Arms, a deity-like figure of destructive powers.
Split into simpler sentences: A short time later, Riveda tells Deoris that she must return to Domaris' care, but first performs one last Black Robe ceremony with her in a subterranean chamber. This ceremony awakens The Man With The Crossed Arms, a deity-like figure with destructive powers.