Everlasting torches would be kinda lazy
What I'd like to see was a very rare werewolf-disease - say someone gets it as a present or such (say a random kingdom royalty member), to spread it. You have it for a week, and it will cause you to turn into a wolf every second or third night, or, better, every second or third night that you are online. In that form, you cannot use items but bite people, and you can decide to spread the disease, but you can only do so once, the second time you lose it yourself. If there are 2 werewolves, you will pass it on with the first bite, i.e. there can only be 2 werewolves at a time.
Yes, yes, it's late, it may be a stupid idea but I like it in my dizzy state of mind...