Sanguine spines (RS3): Can be used to tip havensilver bolts +1 to upgrade them further. Current price 1,430 gp, 2+ verified trades on PriceCheck.gg.
Sanguine spines are Fletching materials received as drops from Silverquill, the Dreadhog . They are used to upgrade the tier 30 havensilver bolts +1 to the tier 60 havensilver bolts +2 , granting 70.0 XP in Fletching per ten bolts crafted. This requires level 65 Fletching and to have learned how to make havensilver more durable from Liat .
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