Fusion War

The Fusion War was a conflicted between Darkness's Imperial Military and multiple variations of the Military and 416 different versions of Darkness.

Prelude
Darkness sought out his doubles in order to merge with them in order to advance his power and control 416 versions of his Military. While 208 Darknesses agreed with his plans 208 disagreed. This began the war across 416 different universes and nearly ended Earth.

Conclusion
Darkness met with Tread Light; An Absolute Jinn and used his wish powers to make 411 of the remain Darknesses merge with him while he kept his physical appearance. As result; his power amplified and he became the most powerful Claddus-user in the Multiverse.