Hunting Grounds: Sheerside Mountains is a Hunting Ground activity in Horizon Forbidden West.
A Hunter and Strike Carver that sells Strike Pieces can be found here, along with the Groundskeeper Lokattok.
Trials[]
Frost Trial[]
Use Frost ammo on Bellowbacks to build up to the Brittle state and destroy their Cargo Refining Sacs.
Shredder Catch Trial[]
Hit a machine three times with a Shredder. Catch it upon return each time to charge it. When fully charged, hit a machine with it to inflict massive damage against your enemies.
Plasma Blast Trial[]
Use Plasma ammo on a Rollerback to build it up to the Plasma Blast state, which starts a timer. Inflict max damage to the machine to create the most powerful explosion when the timer ends.