The Breaker prison located in Thunderclap, also known as Algul Siento or Blue Heaven by the taheen and can-toi who guard it. This facility houses 307 psychics who use their wild talents to weaken the Beams holding the Dark Tower in place. Despite being located in the poisoned lands of End-World, the Devar-Toi operates under an artificial sun and provides its Breaker inmates with comfortable accommodation, good food, and sim entertainment. It is guarded by can-toi, taheen, and human guards, and serviced by robots and the Children of Roderick.