Old nun arrives in a puff of smoke and mutters, 'You have slain down all the
slaads within one day. Magnificent, you remind me of myself when I was at your
age. Ah, your reward, here is a key that I confiscated from a fiend. I am too
old to find out which door this key fits in.. although I have a pretty good
idea. Good luck, may Las guard your journey.'

Old nun gives you a key.

* CONGRATULATIONS! You have completed nun task 'Slaad hunt'*