The first sage asked himself, "But why?"
It should be a scheme against him but he can't figure out the purpose. He is cunning and smart but he cannot phantom what purpose something like that would be done. Surely it is possible. A world god could do it but what would the world god have to gain from doing it?
He too could go and court death to invite a world-ender into his inner world and then use another world god's Supreme law to beat the world-ender to death while simultaneously warping the coefficients of time and space in his world.
So yes, he could do it. But for what purpose? He can't fantom that. The situation doesn't feel like something that happened by chance. So someone did that intentionally and he doesn't know why. That is the most grating thing about this situation. He doesn't like ignorance. If he can't even guess the motive and what is to be gained, how is he to predict outcomes?