Although Ixitxachitl seemed to have little connection with humans on land, as vampires, they controlled quite a few blood thralls.
Moreover, a blood thrall's life depended entirely on its master's lifespan.
For many wealthy people willing to do anything as long as they could stay alive, vampire rays that lived long lives and rarely involved themselves in the messes on land truly made excellent masters.
Although becoming an Ixitxachitl blood thrall carried the risk of being controlled and used as underwater bait to gather blood food for them... wealthy people could buy other people's lives with money.
As long as they provided enough blood food, the Ixitxachitl would allow them to continue living on land.
Besides, Ixitxachitl did not have as many troublesome demands as humanoid vampires... their requirements for blood thralls were extremely low.
Of course, there were drawbacks as well.
Ixitxachitl utterly looked down on other races. Blood thralls were merely tools in their eyes, so naturally, they would never give them opportunities to grow stronger.
Thus, those who sincerely sought refuge with these vampire rays were basically wealthy merchants without much ability or ambition.
Nobles, even minor nobles, would not choose to follow these cold, materially indifferent rays.
Yet these people were truly useful. They had no conscience. They seemed less capable of causing trouble, but because all they knew were scraps and fragments, they dared to do anything and say anything.
With these people, Demogorgon could keep himself fully informed about most events on Toril.
He certainly could not, like Graz'zt, anticipate the Paths of Fate that were about to unfold on Toril, but Demogorgon knew everything that had happened in the past and was happening in the present.
For Demogorgon, that was more than enough.
At the very least, he could deduce the true purpose