Celestrial tech and seeds are definitely involved but I do like the idea that there is a magic element to the Housemen and when you think about it Apocalyse and the four horsemen could be used to create an X with Apocolypse in the center between the four Horsemen.
I like how you think.
"Danielle... I intend to do something rash and violent." - Betsy Braddock Krakoa, Arakko, and Otherworld forever!