I figured it out, Samurai Jack is a lost primarch.
He fights a being of pure chaos, probably a deamon of Tzeentch, and the only weapon that can harm this deamon is a blade created from the spirit of his father, the emprah. he is on one of the lost planets and him being flung into the future was more like a trip through the warp onto a diffrent planet that the deamon,Aku, had already subjugated