Lind felt the weight of it all.
It had been just a connection to dragons at first which was damned odd but could be pushed aside with some concentration but later he began to notice his body was getting lethargic if he did not get real sleep or extensive cultivation sessions.
It was part of why he went to get help as his calculations showed he would have taken close to 3 centuries with periods of sleep growing to months long at a time. It all assumed he did not collapse and die in those moments too.
He also was finding it harder to use his natural Qi and demonic Qi. The Celestial Qi still answered him but it was very limited in its use for him. If not for the dragons, he realized he could never have even finished construction of the Hacore.