Duradel

Duradel is the highest level Slayer master, for players who have not completed the quest While Guthix Sleeps. Players must have at least level 50 in the Slayer skill and 100 combat before they may receive Slayer assignments from him. Duradel is found upstairs from the fishing shop in Shilo Village. To have him assign you a task, players have to have completed the Shilo Village quest. During the cutscene of the battle between the heroes and Lucien in While Guthix Sleeps, it is revealed that Duradel has a combat level of 197.

Once the player has completed the quest Smoking Kills, they are rewarded with 15 Slayer reward points for completing a task assigned by Duradel, assuming that they haven't switched tasks with Turael/Spria. This makes Duradel the most rewarding in terms of reward points. He also gives 75 points for every 10th task, and 225 points for every 50th task completed.

In While Guthix Sleeps
He has a small role in the While Guthix Sleeps quest, belonging to a collection of eight warriors that attempted to save the player from the fortress of Lucien. He is one of the six soldiers that perished in the ensuing battle. After the battle Lapalok replaces him as the highest-level Slayer master.

Upon questioning him in the White Knight's Castle as he prepares for his fight, he reveals he was being kept in Shilo Village by an unknown higher authority, and required special permission from them (he seemed to communicate telepathically with them) to leave for his part in the quest. Apparently, he took several shortcuts and 'trod on very important toes', as he puts it, to become the greatest Slayer master. Unfortunately, he will not reveal any more information to the player, and states that he will take this secret to the grave to avoid tempting others. He does just that.

Also after this quest, a statue of Duradel is fittingly placed next to a statue of Turael at the entrance to the Slayer Tower near Canifis, and another statue can be found around the lake in Falador Park along with the other 5 heroes.

Assignments
Once a player has earned the right to use Duradel as a Slayer master, he may have assigned any of the following monsters:

Cape of Achievement
Duradel sells the Slayer cape to any player with level 99 Slayer for 99,000 coins. After his demise in the quest While Guthix Sleeps, he is replaced by Lapalok, who will still sell a player with 99 Slayer the Slayer cape.

Trivia
There is a glitch, if assigned a task, and asked "Got any tips for me?" Instead of Duradel or Lapalok, the game shows slayer_master_5_multi. This glitch cannot be seen if using an Enchanted gem or a Slayer ring. NPC Contact will not work either. It can only be seen if talking personally to Duradel or Lapalok.

He wears a pair of rune claws.