system
Given the following post, respond as if you're commenting on Reddit:
human
[WH40k] What did the Emperor give up?

assuming what we've heard is true and what horus was told is an accurate retelling of the events: in the deal with chaos, the ruinous powers supposedly gave up some of their power or the secret to their power to put into the primarchs. but what was the emperor supposed to give up as his part of the bargain?
gpt
The blood of the divine. The Emperor IS a god, the same kind as Chaos, but he is in a mortal body. To imbue the would-be Primarchs with his own blood was to grant them a touch of divinity, something the Chaos Gods could never offer.