Wow, few days ago I decided to finally read the manga (the anime is probably going to be the utter shit, you know it! they'll probably finish the dungeon in like 3 or 4 episodes) and what a great timing, she comes out of the dungeon... No cliffhanger at all xD she did it!
And lol looks like all this time people have been complaining because she's evil? of course she is! she has the taboo skill but beside that EVERYTHING in that dungeon tried to kill her, even humans! only after getting the fear skill is that monster decided that it wasn't a good idea to face her head on... This is like those RPGs that don't activate the skill level gap mechanic where inferior monster won't bother you, so you have to kill goblins in lvl 90 because they get in the way.
What really surprised me was that she decided to face the earth dragon without waiting for her other minds to come back, was there really a hurry? also impressive that she didn't evolve with just that kill.