The Melech Hashadim, A title given to Paul Atredis by the ones who once plotted, resisted , and finally fell to the corners of the Universe by his hands, their attempts to bind him to a rumoured "messiah" like figure failed, there plans stretching several centuries crumpled to dust.
They would have succeeded in there grand schemes, but two variables none of them could see existed.
A soul, belonging to a completely diffrent universe awakened within Paul's body, one with knowledge over the entire Dune Storyline, one that would stand as the new Paul Atredis.
And The Engineer, a remanent of a by gone era, The Aladhi earaf alkathir.