The secret

"You...say you see them? Who exactly do you mean?" Aru tried to remain calm at Robin's words, but the trembling was very clear in his voice

"I mean what was going on in the solid energy foundations, starting from foundation No. 41 up to foundation No. 43, of course." Robin smiled from ear to ear, "your solid foundations up to foundation No. 40, that is, up to the top of the Sagehood realm, was going smoothly and without much going on, but all This changed when you came to Foundation No. 41, that is, the first solid foundation in the Emperor's Realm, Isn't it?" 

"What nonsense are you saying? I should have expected you to be a mad man like your demons!!" Aru shouted again