Silver key crimson is a key and reward from the Shades of Mort'ton minigame. To obtain it, the player must kill either a fiyr shade or a asyn shade and then burn its remains on a pyre. This is the best key that players can obtain as a reward from an asyn shade. The key may be used to enter the Shade Catacombs and then open the correctly coloured chest. It will open a silver-framed chest with a crimson lock. This type of key can be used to open any door within the tombs, giving players unrestricted access to all areas.
This is the most common key given when burning fiyr shades. If players are planning to kill a large number of shades, this is the type of key recommended to keep a single copy of, as it can be used to easily access the fiyr shades.