Locate Dreamer was created by a dreamer named Wren Soul. He was one of the first Dreamwrights, one of the ones who braved the chaos before the city was built. Before the threshold was built, just after the dreamers learned to shield their souls, they entered the dream, but often were lost in the great eddies of the unawakened unconscious. Wren found that with the combination of the dreams raw elements, that he could think the name of another dreamer and knows about where they were. If they were close, he could get a better location on them. In this was, the dreamwrights found each other and joined to form the threshold.