Since Jack Clark entered the Demon God Sect's Demon Domain, only a little over ten minutes passed before the collapse of the domain, with most of the time spent eradicating the True Bodies of the Three Demon Kings.
Even so, the speed at which the Three Demon Kings fell shocked the alien deities who had been watching the whole time.
Because they died too quickly.
The weakest of the Three Demon Kings of the Demon God Sect were all in the late period of the Legendary Realm and due to possessing powerful ancient Inheritances, each was considered among the stronger in their own level.
Strong men of such a level, even when facing the early Myth contenders, could hold on for a while, to say nothing of the three of them together.
Add to that the amplifications of standing firm in the Demon Domain and the suppression of their Boundary, and the fact that they were defeated so swiftly made one wonder, just how strong was this human king? Or perhaps...