From Downfall

Since the beginning, humanity looked to the stars in awe of the Celestials' bodies looming over their world. At some point, wonder turned into reverence, and the world was suddenly shattered into three religious factions. Each one worships one of the three Celestial bodies: Sedna, Mother of the Deep, Orcus, Lord of Order, and Eris, the Unfettered. As the three factions wage war against each other, A young and ambitious emperor looks up at the Celestials and declares war on heaven.

This is a tale of a man(?) who wished to conquer the stars.