So, the being that took the Endstone is probably a Vaar, as the side-story mentioned. Clearly resembles the art we saw there. Beyond that, feels like not a lot was really answered, mostly just sort of vaguely setting up stuff. I guess Tezz will uncover some shit about the Vaar, who're probably Fomori-related (because SOMETHING has to be at this point), and we'll get a clearer answer of "Hey how the fuck did Tezz even get here" later down the line.