Finding a Firestone in Monster Hunter Wilds is an important step in upgrading your weapons, especially if you're favouring the fire-based Quematrice tree. Since this is one of the first weapon types accessible that deals elemental damage, chances are you probably crafted one to set monsters ablaze.
This rarity three weapon upgrade unlocks after you defeat the Rompopolo in the Oilwell Basin as part of the main story. So, if you want an even better fire weapon to go with your scorching surroundings, you're going to need that Firestone.
