Thane Ector is a genetically altered super being, created to be the ultimate warrior. He is the cream of the proverbial crop, and spent years honing his combat skills inside the Brethren's ranks, before achieving the rank of Thane
The Celestials used their genetic knowledge to transform primitive pre-human bipeds into the Eternals. The Celestials then foresaw a need for a control group in their experiments, a balance. The Celestials took the bacilli, the Spirilla, the cocci, and other bacteria and germs from the planet Omega Climion VI, and formed the Brethren. The Brethren served the Celestials, awaiting each planet's judgment from Arishem the Judge. Upon a negative judgment from Arishem, the Brethren would sweep onto the unfit planet and destroy everything on it. The Celestials eventually lost interest in the Brethren and let them loose, allowing them to spread destruction throughout the universe, until the Collector found them and added them to his collection
