The Cult of the Unwritten Book believe that when God created the Earth he said ‘Let there be Light!’ and those words cast a shadow which became the Decreator – an entity of pure annihilation unable to be reasoned or even stopped. Members of Doom Patrol succeeded in slowing him down to such point that no one would notice the slow disappearance of the universe by using similar vibration equal to his powers.
Powers
As the Shadow of God the Decreator has no personality, no morals and holds no ties to good or evil, simply decreating things not out of hate or pleasure, but because it is in its nature.