Merlin's Crystal

Walkthrough

 * Talk to King Arthur to start the quest
 * Talk to Sir Gawain and Sir Lancelot to learn more about Keep LeFaye.
 * Ask Arhein of Catherby about his deliveries
 * Get another player to talk to Ahrien (distracting him) while you stow away in his boat
 * Kill Sir Mordred (top floor) and discover how to break the spell from Morgan LeFaye after sparing his life
 * Escape via the ladder on the middle floor

Bat Bones
Kill a level 32 bat outside the tower.

Black Candle
Pick up the insect repellent from a house in Catherby, and a bucket. Head to the bee hives west of Catherby, and use the insect repellent on one, followed by the bucket to get wax. Take the wax to the Candle Maker in the nearby house. He will hand you a black candle.

Excalibur
Talk to the Lady stood by the lake, south of Taverly. Obtain some Bread and proceed to Port Sarim Jewelry store (you can buy some from the nearby food shop if needed). Give the beggar the bread.

Magic Words
Go to the Chaos altar in Lvl 11 east wilderness. Check it to find the Magic Words

Vanquish the demon
Go back to Camelot, and head northeast round the castle until you find a pentagram. Light your candle with a tinderbox, drop the bat bones on the pentagram, and use the Magic Words to vanquish the demon.

Freeing Merlin
Head up the tower to free Merlin from the Crystal, and then speak to Arthur.

Rewards

 * &6 quest points
 * Excalibur