Shade skulls are obtained from gold chests in the Shades of Mort'ton minigame. They can be added to any elemental staff, battlestaff, or mystic battlestaff, to change the appearance. Elemental staves become skeletal staves, and battlestaves become skeletal battlestaves. However, if they are added to a single-element mystic battlestaff to make an elemental Necromancer's staff, it also adds a 5% magic damage bonus. Adding a skull to a combination mystic battlestaff, such as a mystic mud battlestaff, does not add a damage bonus. This operation requires level 85 Crafting and provides 130 Crafting experience.
As the skull staves are untradeable, the skulls can be removed from the staves. There is a cooldown period after adding a skull to a staff, where if it is removed, the Crafting experience is not gained.