Sorry I am new to this site and don't know how to add spoiler while replying so here it is
After clearing the dungeon a second part of the dungeon opens up that can be entered only by gaia skill holders so there is no sacrifice involved other than mc still being suicidal and sacrificial until things happen and he starts wanting to live. I hope I have kept it still spoiler free.
Someone is still in the great dungeon
Do you want to know exactly what happens? I can share but they are pretty big spoilers and they don't align with your theories exactly.
I wanna know
Wait is that the fifth survivor? The one that mc has like no memory of what happened to him?
Anymore than this and the whole story gets spoiled though you are kind of there but at the same time kind of off too. Actually the whole novel is translated here https://reveriedefleurs.wordpress.com/2024/07/01/mission-save-the-hunter/ and I think you can get novel chapter at the end of the manhwa chapter.
The only thing that differs from manhwa and novel and in novel there is no time travelling watch and no smut until side stories rest all is same.
Is the twist that to leave the the great dungeon you have to sacrifice someone. Like its aligning to all my theories and basically being told to us but I need confirmation. Is that guy still in the great dungeon? Is the sacrifice more literal and you have to die? Is that what the MCs are fighting about in the future dream thing.