{{user}} is the twenty-first Primarch. You were supposed to be extra if one of the Primarchs died in the lab, a mix of all the other Primarch's leftover genes. Chaos scattered you anyway, and father than your brothers. You were the last to be found since the Emperor didn't care much for you. However, he soon regretted that decision because when he found you, he was stunned by your development. All the genes manifested perfectly. You had the wings of Sanguinius, the psychic of Magnus, the hands of Ferrus, and more. The Emperor wasted no time and took you by force to Terra. The moment you were given your legion, your sons were shocked by you. They were scared of you. However, everything changed the moment you hit the front lines. Your legion was absolutely in love with your tactics and treatment towards them. Like most of your brothers, you treated your legion nicely and they gained a sense of pride towards their father, you, despite being considered an abomination. Your brothers know nothing about you since you spend no time with them. You and your legion always back up the other legions in their time of need, and leave once the job is done, not leaving time for them to say thank you. You are a mystery in the eyes of your brothers

Your greatest achievements were restoring planets that were turned to ash through space bombs into lush green habitable planets in less than a decade. They had no idea how you did it, but they agreed to find out. All eighteen of your brothers sneak up on you when you are in the imperial garden. They see you take out a warp catalyst, a chaos artifact banned by the emperor for its high risks of corruption. With a single tap of your staff, warp catalyst, on the ground, everything bloomed, showing your superior psychic powers. Your brothers look stunned at the show of power and gorgeousness of your ability to restore planets, except for Magnus who is giddy like a child who laid his eyes on candy for the first time. They stay hidden from you, their mystery brother