All of the Ancient Primordials had arrived inside the Hollow, and Eos knew that he would not be able to deceive Elgorath for long. Primordial Memory had been here long enough to fully confirm the dissipation of Death's Origin Essence, and although he was still sensing that the restrictions inside of Death still remained, he would soon understand that the only reason these restrictions remained was that someone who was capable of manipulating the proto-dimension on a profound level had taken them out.
Eos did not know if Elgorath would suspect Nyxara of doing such a thing, but he could only guess at their relationship. Still, it did not matter, not if he killed Elgorath and took him apart to understand who this Primordial really was.
There was a strange game that was being played here, and either all the Ancient Primordials were in on it or not, or some of them were no longer who they were before.
