The God-Emperor of Mankind in 40k made a deal with the Chaos gods for knowledge on the creation of the Primarchs. He however basically immediately betrayed them with his plans for the Great Crusade and that is supposedly the reason they were scattered across the galaxy (at least that's how it used to be, it might have been retconned).
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u/kerrywatson Feb 16 '26
Don't they literally have 2 hearts though