Turns out the legend was true – there was treasure in the mountain chasm! Its most valuable piece is a rare-looking sword, which may have belonged to Knyaz Skender himself. I imagine he shed a lot of innocent blood with it... Maybe now I can find a better purpose for it.
The XP shown is the base quest reward; other bonuses or rewards earned earlier are separate.
This outcome appears more than once in the quest flow, so it is listed only once.