You are right, maya, these are bugs. Thank you for reporting them.
I don't see how the sub dungeon could not spawn at all, but the fact that it could spawn
under one of the bosses seems possible. I'll fix that.
Also, I can tell you that the Troll is probably the most powerful class to beat Curious Troll Lab,
if you find the right strategy (or should I say exploit?) you can even beat it with the Vicious Token too.
Don't worry for Phantom Citadel, all the crashes have been fixed now. Including the one caused by plants, I made sure of that.
Concerning Curious Frigid Battlefield, yes they are all linked together. Good luck!
And for Curious Slime Pit. I confirm that the mystery meat not gaining poison, corrosion etc. is intentional.
I'm only the code-executor of The Avatar's will, so I don't know for sure why, but it make sense to me as these
blue guys are already much nastier than the other mobs of the dungeon. In particular mana burn + poison + corrosion
and their huge health would make them really annoying I guess.