Ahh, okay now this makes sense, thanks
... just one more question... who was it exactly who took control of numidium and how?
"How" was by the Hero of Daggerfall giving it to them.
The metaphysical mechanics of the mantella and Numidium's operation and all that are a bigger subject that I'll get into here.
If I recall correctly, "who" was each of the leaders of Daggerfall, Sentinel, and Wayrest, as well as The Underking, Mannimarco, Gortwog of Orsinium, and The Blades.