The Coltello is a specially crafted rare dagger that can only be found by completing the Coltello Weapon Upgrade Quest. This quest will automatically appear in your Quests Journal when you reach Dagger skill level 15. This weapon has a wickedly curved blade and is bladed on both sides, ending in a jagged, cruel point, such design is unique to this dagger and not found on any other weapon in the game. It also has a Powerful ability, which makes this dagger very lethal. Note: If you have already completed the Coltello quest and sold or trashed the dagger, you cannot obtain it again.