The Decreator

The Decreator was a powerful supervillain from DC comics, appearing in the Doom Patrol series - it is described as the Shadow of God, thus may be an aspect of the similar entity known as The Great Evil Beast (though this has never been confirmed either way).

History
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. However when the entity managed to manifest in the mortal plane with the aid of said cult 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.

As the "Shadow of God" the Decreator has no personality, no moral and holds no ties to good or evil, simply decreating things not out of hate or pleasure, but because it's in its nature.