Each set has an individual string of scavenger hunts to complete in order to upgrade the gear fully. The collections of Witcher Gear correlate to various witcher schools. These quests serve as maps leading to a set of diagrams, which Geralt can bring to a smithy to craft the corresponding equipment.
The other form of upgrading is by tiering up the basic quality Witcher Gear, obtainable through quests known as “Scavenger Hunts.” Scavenger Hunts can be found by chance during Geralt’s travels, or more reliably by buying them from Merchants. They may then choose a compatible piece of equipped gear in which to fasten the runestone or glyph. By selecting a runestone or glyph, some text will appear prompting the player to socket the item. Runestones and glyphs may only be socketed in gear that is currently equipped. Some weapons and pieces of armor will have sockets on them - indicated by at least one empty circle - in which runestones and glyphs may be fitted. There are two forms of upgrading gear in The Witcher 3.