Reward: 3 Quest points and the Silverlight sword

Starting Location: The middle of Varrok market

Items Required: 1 gold coin, 1 bucket or jug of water and 25 normal bones.

Go the the red and white striped tent and talk to the gypsey inside.She'll ask you for 1 gold coin. She'll then tell you about a special sword called the silver light, which is the only sword powerful enough to Kill Delrith.

Go into Varrok castle, just North of the tent. Look for a man named Sir Prysin.Before you can have the silverlight you need to get 3 keys for him.
The First Key:

If you go to the most North Western part of the castle, then go up the stairs twice, you'll meet Captain Rolvin. Talk to him and he'll give you the first key.
The Second Key:

Go back downstairs and into the kitchen, then through the door and into the courtyard. If you look on the floor just to the left of the door, you'll see a drain. Use the bucket of water or jug of water on the drain. This will cause the key to fall into the Varrok sewers. To get into the sewers you need to go to the East of the castle. The entrance to the sewers is at the red exclamation mark (!) on your map. Once you get to the sewers you'll need to follow the North Western Path and eventually you'll find the second key with fell down the drain.