The Soul Claim

What would happen if the SCP foundation was in the 40k universe? Humanity is nearly annihilated during the fall of the Aeldari, just like how Slaanesh has a claim on the Eldar souls, Tzeentch has claim on human souls, now, humans escape to a realm between realspace and 6th dimension. New Xenos empires, no imperium, Rangdan are still kicking and there is another eye of terror.