Warhammer: The Horus Heresy from the Start

A modern man, An Nan, is transported into the Warhammer 30K universe, only to find himself thrust into the opening flames of the Horus Heresy. As a mere psyker of negligible rank, he possesses one inexplicable advantage: the whispers of the Warp hold no sway over his mind. After a harrowing journey fraught with peril, he finally reaches the Imperial Palace on Terra, believing himself safe within its walls. But the Emperor—the "Yellow King"—has other plans. Without warning, An Nan is subjected to a brutal surgical procedure: the organic legacy of the Zeroeth Primarch is forcibly implanted into his body, binding him to a fate far greater and more terrifying than any heresy he had fled.