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Monster Hunter World (MHW) Brutal Bone Guide: How to Find and Use It. Brutal bone is a material used to forge and upgrade the best equipment in the game. It is one of the rarest items you can get and is only second in rarity to the warped bone in the bone item category. The item is only found in a single location in the Elder's Recess. The likelihood of finding the brutal bone is low and down to luck. You can also get the material by completing certain high-level quests as base rewards.