Solve the riddle!
A far off land in Kalimdor awaits
Where peril has dashed hopes and fates
East of Barrens the weather is harsh
Gloom and danger pock Dustwallow Marsh
But there lies a clue for those up to the test
Waiting to be found in a cave in the southwest
You find a musty scroll.
- 5050 XP
The Bloodfen Burrow is where the musty scroll can be found.