A power outlet dungeon feature, which you can put a brass lantern on to plug it in and recharge it for free, although this takes a fair amount of time.

If you eat Ogresmasher, there is a 5% chance that you digest the magic of the artifact and raise your maximum (but not current) Constitution to 25.

If you a destroy a quest leader’s throne, there is a 1 in (Luck + 1) chance that they become angry, but they won’t expel you from the quest until you attack them.