It took me about 20 serious attempts but now I can finally claim the word: Victorious!!! For some reason Xaskazien did not have max health but its fate was sealed anyway.
You did an awesome job with the dungeon (cavern?) generation, the kind that could only be achieved with years of fine-tuning. One small blemish would be the rare occurrence when you start a floor on a monster's tile, triggering a combat round. That just feels wrong so hopefully that's a bug and not intended!
QoL/idea: Toggleable "As long as it remains in your inventory" items. That can be highly desirable (Enchanted Arrows) and would blend well with certain effects and traps.
Already starting a new quest, the game is definitely a keeper!