Along with spell mastery talents, you can upgrade your witch or wizard's offensive power by upgrading your Gear in the Room of Requirement. Each piece of wizard wear can be upgraded using the Enchanted Loom to increase its defensive or offensive stats as well as apply powerful traits that can boost specific types of spells' damage or buff defenses while fighting specific enemies by using materials harvested from fantastic beasts that you've stored in the four vivariums. The player must complete "The Helm of Urtkot" main quest before you can acquire "The Elf, The Nab-Sack, and The Loom" Room of Requirement quest where the Enchanted Loom is unlocked.