without looking at next raws... an egg that size can't mean anything good. You know, the bigger the egg, the larger the trouble it contains. This thing could easily spawn a dragon sized monster. Whatever's inside and no matter what happens in the village once it hatches - the ruckus might very well trigger Ageha to wake up. Then, since the dungeon boss got killed this time, maybe Judith (and Ageha) can both leave the dungeon and intervene.
I only hope Kiska's save point gets updated to the moment he leaves the dungeon. He struggled a lot to get there, so he should at least get some reward. Otherwise if it always starts at the original point, mc will likely turn into a ruthless monster himself, not caring who he sacrifices to make it end. I mean, if this time doesn't work either, there's likely no good way out at all.