The Mage Arena II

Players with level 75 Magic and the ability to cast God spells outside the arena can start this miniquest by talking to Kolodion in the Mage Arena bank. Players must be defeat 3 level 257 demons using god spells in the Wilderness to receieve an upgraded god cape

Getting there
Head to the broken down house north-west of the Mage Arena in level 57 Wilderness. Use a knife or slash weapon to cut down the two webs in the house. Once the webs have been cut, pull the lever on the wall to be teleported into a small cave. The cave is a safe zone, you cannot be attacked by other players inside here. Speak to Kolodion about additional challenges to receive the enchanted symbol.

Battling the god demons
After you have received the enchanted symbol, you can look for the three god demons located within the deep Wilderness, beware of multi-combat zones!. Using the symbol will randomly inflict up to 16 damage to yourself. Warning: It is possible to kill yourself using the symbol!

Each god demon can only be damaged by its respective god spell unlocked from the first miniquest. Upon killing the demon, they will drop a coloured heart which cannot be banked but can be given to Kolodion to hold. Any hearts in your inventory will disappear upon death.

Rewards
After collecting all three hearts, you go back to Kolodion within the Mage Bank to complete the minigame. After you have done so, you will be able to get and wield the three best-in-slot new god capes.