Black key crimson

Black key Crimson is a key and reward from the Shades of Mort'ton minigame. To obtain it, the player must kill either a riyl shade or a asyn shade and then burn its remains on a pyre. This is the best type of key players can get as a reward from a riyl shade. The key may be used to enter the Shade Catacombs and then open the correctly coloured chest. It will open a black-framed chest with a crimson lock. This type of key can only open doors up to black within the tombs.

Possible rewards
Possible loot from the chest include:

Misc
Black key crimson