The slender blade is an item used in Devious Minds. To create it, the player must take a mithril 2h sword to Doric's home just north of Falador and east of Taverley, and use it on the whetstone there. A Smithing level of 65 is required in order to be able to perform this task; a boost from a Dwarven Stout (m) will work. Adding a bowstring to it with 50 Fletching turns the blade into a bow-sword.
- It resembles a katana, which makes sense, since the bow-sword that you make from it is supposed to originated in the Eastern lands.