Viper School Witcher Gear is an addition that crops up in certain places in the game – the standard weapons at the very beginning of the base game, and the armour and venomous weapons at specific points in Hearts of Stone.
These are required levels for crafting Witcher gear items.
Here’s a little guide to Griffin School Witcher Gear. Where to get it, what you need to make it, and what the Grandmaster set does.
In new Game Plus mode there is a whole new set of armour that can be crafted, called the Grandmaster Legendary armour.