This system brings the world to a "reset" point in the past when either Anima is on the verge of activating or the Collective Unconscious is on the verge of collapsing. When the system is invoked, every consciousness forgets its past life. Thus humanity lives in an eternal cycle. Wilhelm has succeeded many times in activating the recurrence in previous universes, but each recurrence differs because U-DO is unaffected by the recurrence and its consciousness continues to evolve.