Nearly another month passed.
By then, the fleet of the Wolf King Leman Russ, known as the Emperor's Executioner, and his Sixth Legion had arrived above the orbit of Prospero, the homeworld of the Thousand Sons.
To the Sixth Legion's surprise, for reasons unknown, the fleet the Fifteenth Legion had originally stationed in orbit had vanished without a trace. As a result, the space battle that had been expected never took place.
Though he did not know why the fleet had disappeared, the Wolf King Leman Russ still sent a final ultimatum to his brother Magnus on Prospero as soon as he arrived. He demanded that Magnus disarm, evacuate the civilians, and unconditionally submit to the Sixth Legion's custody. In return, Leman Russ would refrain from immediately carrying out the order of annihilation and would instead take Magnus and his Legion back to Terra.
As a Primarch, the Wolf King could sense that his brother Magnus had no desire to fight. He had not fled in disgrace alongside his fleet, but remained on the planet, waiting for him. Suspecting there might be more to the situation, Russ decided to capture him first and ask questions later.
Besides, he truly did not want to commit fratricide. If the Emperor had really resolved to execute Magnus, Russ could take him back first, and he could be put to death on Terra.
Unfortunately, for reasons unknown, the Wolf King Leman Russ never received a reply from his brother.
That was right. Not only had Magnus failed to answer him, but Prospero itself had given him no response!
After waiting several days and seeing that the Lord of Prospero refused to cooperate, and that the entire planet remained unresponsive, the Wolf King finally exhausted the last of his patience and reluctantly made up his