Warhammer 30K: Journeying Through Myriad Worlds with the Primarchs

After transmigrating into Warhammer 30K, while everyone else clings to the Emperor, he finds two Primarch infants from the start and becomes their father. Guilliman was supposed to become the ruler of Ultramar, and Angron was supposed to die in the gladiator pits with the Butcher's Nails in his head. But in this life, they meet only a hunter from the mountains. He teaches them to read: a person stands on two legs; those who kneel don't count. He teaches them to make a vow: let the people below the mountain live on their feet. From the wilderness to the stars, from the Myriad Worlds to the Siege of Terra, they overthrow tyranny and establish a republic. They awaken Sanguinius, Ferrus Manus, Mortarion, and Curze, letting the Primarchs who were meant to die live, and those meant to fall rise again. The Horus Heresy ends. The Emperor sinks into the Golden Throne and gazes at the republic. "Humanity finally no longer needs a god." Their answer is always the same: the future belongs to the people.