"I am finally back here. It has been a long time. Now I just need to look for the passageway connecting to Alrein's universe and wait until it opens when the isolation is finished."
After dealing with all the universes that interacted with Alrein's universe, Yale went directly to Master Liye's Universe, which had already ascended. However, that didn't include universes of a higher level because Yale couldn't go there without advancing to Minor God, and although he was at the point that he could advance at any moment, he was restraining his level from increasing. Anyway, universes usually only targeted others of the same level, so Yale wasn't especially worried about them. He was confident in being the first in entering Alrein's universe, and anyone with the guts to attack would need to face him.
Although it was still in the isolation period, as the owner, Yale could enter and leave at will.