The Jailer is a monster who guards the Black Knight jail deep within the Taverley dungeon. After he is killed, he drops a key that unlocks the two nearby cells. Players seeking to kill the jailer should beware of the aggressive, level-76 Lord Darquarius nearby.
Points of interest
In the cell on the south side of the prison is Velrak the explorer, while the cell to the north holds 2 dwarves. Once inside Verlak's cell, the player may obtain the dusty key, which is required for accessing the dungeon further. This step is completed during Hero's Quest, but can be done at anytime.