We, the Order of Sacred Fire, have given an Oath, to protect the Inner Sanctum and guard The Undying One that is held below. This we shall promise with our lives and for all ages to come.
The Order of Sacred Fire is an ancient society of Goromorgs, dedicated to preventing the Undying One from ever escaping its prison. Their existence is only discovered on Level 9, but their presence throughout all of Mount Grimrock is clear. As Toorum observes in one of his notes, some people must oversee the dungeons, resetting the obstacles undone by previous explorers.