Someone in my LS did it yesterday. Here are the steps:
1) Go to Korrokola Tunnel.
2) Get to the area with the ???.
3) Sneak yourself(with spell or Sneak Oil).
4) Click the ???.
5) Leeches will spawn but won't attack you if you have sneak on.
6) Wait a couple of minutes(around 5 minutes).
7) Leeches will despawn.
8) After the leeches despawn, click on the ??? again the get the key item.
Don't have to kill anything
.
1) Go to Korrokola Tunnel.
2) Get to the area with the ???.
3) Sneak yourself(with spell or Sneak Oil).
4) Click the ???.
5) Leeches will spawn but won't attack you if you have sneak on.
6) Wait a couple of minutes(around 5 minutes).
7) Leeches will despawn.
8) After the leeches despawn, click on the ??? again the get the key item.
Don't have to kill anything
.



Comment