Responses
I don't think that's what they meant. Beru/Author-nim probably means that the gate on Jeju Island is an S rank gate equivalent to the current one in the sky
I think so too..
They meant that beru knows better on how difficult it will be since he was the previous boss monster of an S rank dungeon
Okay the author are just forgetting thing at this point, beru gate is at jeju island the one on the sky is the frost giant one where Yuri the barrier guy got kill by the rebound