Unicron  

Chaos Bringer, Lord of Chaos, Planet Eater, ユニクロン

In ancient times, there was a deity known as Unicron who sought eternal peace through the annihilation of all existence. Miraculously, he achieved his goal, erasing all life, celestial bodies, and even the fabric of space itself from the universe. However, despite his satisfaction with the destruction, Unicron neglected to eliminate every last fragment of the old universe. As a result, new matter interacted and gave birth to a fresh cosmos. While Unicron slumbered, the consciousness within this new universe's core emerged as Primus, the embodiment of light. Upon awakening, Unicron discovered he was encircled by another universe and proceeded to attempt destruction once more.