The Battle of the Cosmic Entity Guardians has spanned 1.5 million years, starting as a casual diversion organized by a few Cosmic Entities and gradually evolving into a competition among all the Cosmic Entities of the universes.
Some rules were established to ensure that the guardians of the participating Cosmic Entities were well-matched in strength, making the battles lengthy and preventing significant losses to any Cosmic Entity.
The Cosmic Entity of the third universe was the first to personally enter the fray and, consequently, became the first to be slain.
William the Obliterator's notorious reputation left other Cosmic Entities feeling uneasy.
Yet, William no longer cared about such matters.
Indeed, he had once been interested in things beyond his universe, but fighting was never his interest.