Void Sepulture

 is a location found to the right of the Dragon's Gate. Voidling Fanatic and Voidling Extremist can spawn here. This location requires to enter. It is recomended to have decently good armor and weapon to grind the mobs, as they deal a lot of damage and have a lot of health.

Trivia

 * If you try to use the Horse Pet glitch to enter without at least Combat level 25, you will be teleported out instantly.
 * Located under the warp pad to enter the Void Sepulture at, there is a hologram reading.