43 Votes in Poll
Because I imagine "clearing the deepest floor of the dungeon" will also involve Bell's rematch with Asterius, I feel like the answer would be connected to whether Asterius or the OEBD will be Bell's "final boss". I'm personally leaning towards clearing the dungeon/fighting Asterius being first, and then the OEBD as the final arc.
I disagree on the poll of fighting the Black Dragon first because this event will be the last.
The exploration of the last floor of the Dungeon is the most reasonable to me and is attainable now.
The Black Dragon fight will be intensely brutal for everyone so expect casualties.
The dragon came from the dungeon. It stands to reason the thing that created the dragon would be stronger, hence making it the last boss and ending the human/monster war. The dragon probably ate aria to make itself stronger, but i doubt that makes it stronger than the dungeon itself.
Also, i have a feeling that oebd, leviathan and behemoth are escaped floor bosses from deep in the dungeon rather than just random enhanced mobs. If so then bell and co will need to beat them all again before reaching the final floor.
The OEBD, Bhemeoth and Leviathan aren't enhanced species, true, but they aren't floor bosses. They are black monsters, so they won't re appear ever.
OEBD is supposed to be the best the dungeon has to offer, so the most logical thing to do would be to clear the entire dungeon in preparation for defeating him, the opposite would be to think that deep inside the dungeon there are monsters stronger than the dragon and if the "level" of the dragon is a problem for the plot, how would the problem be if in some floor of the dungeon, the monsters had the same level as the dragon lol?
As for the birth of new black monsters, the dungeon spawned them in the past for some reason, and if the cause repeats it's reasonable to think that the dungeon would spawn them again.
Another reason I believe we may get the last floor of the Dungeon before the OEBD: Ais. We are most likely going to find out the truth about Ais' whole ordeal prior to the OEBD fight, and since it seems clear she has some connection to the dungeon, it makes the most sense to resolve Ais' mystery and the secret of the final floor together. And then you have the climax of the story as both of them fighting the OEBD together.
I agree the last floor of the Dungeon will come first before One Eyed Dragon this plot hole must be finished before this monster.
What do you think?