It was the first time the talk of leaving the lower realm and going to the upper realm had ever been brought out to his hearings But Zeras wasn't dumb. He knew well there was no way his parents could be from the lower realm and most probably come from the upper realms.
That automatically tied him to the upper realm. It was only due to an unknown factor that he was even here in the first place. That was why he knew well he would have to one day leave for the upper realm.
But could he simply make a blind choice and simply head over? No. Going there right now as he is Going like being a headless fly. If he wanted to move to the upper realm, then it had to be for a good reason, and the only reason he thought was worthy enough of him to leave was trying to find his origin. To find his true clan and his history.
And to do that. He needed important information. Information only a single person in the world could provide him.