Challenges were introduced on 21 April 2010. Players can get a unique challenge from each slayer master, which reward extra slayer experience and reward points. NOTE: Reward points are only available if you do the Smoking Kills quest. NOTE: Certain challenges from slayer masters require certain slayer levels.
Unlike a regular slayer task, a slayer challenge cannot be cancelled using slayer reward points at a slayer store. The only way to cancel a challenge once it has been accepted is to ask for a new task from Turael/Spria in Burthorpe. Note that doing so resets the player’s slayer task count to 0.