Demonic chest

Where to Find it
The Demonic Chest can be found at level 45 Wilderness and can be accesed by using the Demonic Gorilla Teleport. 

How to use it.

In order to use the Demonic Chest you need to have a Badge of the Wilderness in your inventory as well as 99 thieving.

Thieving from the Demonic Chest will instantly Skull you.

Obtaining a Rare Drop
After obtaining a rare drop there'll will be a server wide announcement with the location and the rare item you obtained.

Base Rewards

 * 100-165 Diamond
 * 100-165 Nature Rune
 * 100-165 Law Rune
 * 100-165 Dragonstone

Common

 * 100-165 Magic Longbow
 * 100-165 Adamantite Ore
 * 100-165 Rune Platelegs
 * 100-165 Rune Platebody

Uncommon

 * 100-165 Runite Ore
 * 100-165 Yew Logs
 * 100-165 Rune Bars
 * 100-165 Adamant Bars

Rare

 * ​​​​​​​Juggernaut
 * Mystical Knowledge
 * Critical Knowledge
 * Hailstorm Dagger
 * Korasi's Sword
 * Armadyl Godsword
 * Drygore Rapier
 * Wilderness Key
 * Amulet of Vengeance
 * Esoteric Heart