Abyss

The abyss is a reward from a miniquest where you help a Zamorakian mage learn how to gather rune essence. After helping the mage, you are able to teleport to the abyss. Upon entering you are skulled and have your prayer points reduced to 0.

There are two layers in the abyss. One is filled with monsters and obsticles that are there in attempts to prevent you from getting to the second layer. In the second layer there is a Zamorakian mage who is able to repair the essence pouches that are obtained by the monsters in the first layer. There are also rifts which teleport you to any altar available in the game, assuming you meet the quest requirements to enter the altar.