Small spiky rune salvage is a salvage item introduced with the Mining and Smithing rework. Salvage has no use other than disassembly, alchemy, or trading.
Small spiky rune salvage is worth 16,000 coins in high level alchemy. When dropped by a monster, it can automatically be alchemised by a spring cleaner 2000 or higher at the cost of a spring (15,276 coins profit); alternatively it can be automatically disassembled for free by a spring cleaner 3000 or higher. Because it does not use a spring, automatic disassembly does not advance the spring cleaner towards its next upgrade. Dismantle mode does not work on salvage items.
Small spiky rune salvage can also be bought from Elof for 20 rune item tokens.
For an exhaustive list of all known sources for this item, see here
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