Colossal Bones can be collected by defeating High Rank monsters in Monster Hunter Wilds. Unlike the many other resources that you can collect via harvesting points in the overworld, Colossal Bones can ...

Before attempting to track down the Colossal Blue Dragon, you'll need to get Advanced Diving Gear. This costs 15,000C$ and you'll be able to get it at a buoy location explained in the next section.