Be'lakor, the most powerful Daemon Prince, could potentially kill a Primarch due to his abilities. There are a lot of new and interesting Warhammer 40k factions that Games Workshop could introduce.

Who is Perturabo in Warhammer 40k? A strategic genius and master of logic, siegecraft, and technology, the primarch of the Iron Warriors Space Marines was one of the most important traitor leaders ...

Though doughty warriors, they had lost their gene-seed and were unable to replenish their numbers without their Primarch. Travelling to Terra, Fulgrim gave a speech to his diminished legion, and the ...

The numbers would always vary with new recruits and inevitable battle-losses, and also important was the availability of potential recruits and the administrative skills of the Primarch and his ...