Warhammer: Heretic Primarch

In the abyss of despair of the 42nd Millennium, the Imperium of Man slowly bleeds out in never-ending war. The Emperor was silent, Guilliman was helpless, and the shadows of Chaos, swarms, and aliens devoured each world. At this moment, a Primarch erased from history returns from beyond the stars. His name is Lex, but he's on a completely different path. He abandoned the ancient creed of human supremacy and carried a powerful fleet fused with alien technology and a multi-racial force called the Galactic Alliance. He declared that adhering to pure dogma will only lead to destruction. Only by uniting all the forces that can be united can we strive for a glimmer of hope in this dark galaxy. His return was like a boulder thrown into stagnant water, instantly arousing huge waves within the empire. The Inquisition designated him as the ultimate heretic more dangerous than Chaos, and vowed to completely purify him. The Mechanicus was afraid and greedy of the forbidden knowledge he brought, and was full of inner struggles. The awakened brother, Roboute Guilliman of the Thirteenth Legion, fell into an unprecedented dilemma, wavering between ten thousand years of loyalty and rational choices. Every time Lex takes action, it is not only an aid to fight against the real enemy of mankind, but also a violent impact on the foundation of the empire. When the two primarchs walking in the world have completely opposite ideas, and when loyalty and survival are placed on both ends of the balance, a storm of ideas has arisen that will determine the fate of mankind. No one can stay out of this storm, and the final answer will redefine the future of the human empire or sound its final death knell.