The level of fanatic that appears depends on the difficulty of the statue. The higher the difficulty, the higher the combat level of the fanatic will be. Players do not have to kill the fanatic on the first try. However, if the player does flee, there will be a cooldown of one minute before they can attempt to kill the fanatic again.
Killing a fanatic rewards the player with Slayer experience equivalent to using a medium XP lamp on Slayer.