Werewolf skills can only be used while transformed, and while transformed, you can't use your Class abilities — which may cause some problems with certain Class Mastery effects. Up to this point, every Grimoire has given players the ability to use the Class Mastery Signature Script, and we can reasonably assume that ZOS will continue to add new Grimoires to the Scribing system as time goes on, adding Grimoires to skill lines which have no Scribing abilities like Vampire, Werewolf, Undaunted, and Psijic Order.
The effect of Class Mastery doesn't usually change between Grimoires, but it
can change, as evidenced by the different description when Class Mastery is applied to Banner Bearer (bottom image):
Just for reference, here's what each one looks like:
There are some problematic ones. For instance, Templar Werewolves will never be able to cast Class abilities, so they cannot benefit from Sacred Ground while transformed. Arcanist Werewolves would benefit from some passives like Healing Tides which they couldn't before, but Crux still cannot be consumed with Werewolf abilities, even if a Werewolf Grimoire would allow them to create Crux.
However, some of these would be fantastic for Werewolf. Necromancer Werewolves could create a corpse which they can Devour to restore Health and transformation time. Sorcerer Werewolves would have a different bonus depending on whether they're a Pack Leader (have pets) or a Werewolf Berserker (do not have pets).
So, since a Werewolf Grimoire can only be used in Werewolf form (since it would be a Scribed Werewolf ability) and the Class Mastery effect can change depending on the Grimoire (and we're likely to get a Werewolf Grimoire at all) here's how I would adapt Class Mastery when used on Werewolf Grimoires:
I denoted the ones I modified with a werewolf icon. Here's my explanation:
- Sorcerer: Werewolf's only pets while transformed come from the Pack Leader morph. While the description doesn't have to change here, I think it would do well for clarity and it would add a bit of roleplay flavor text.
- Templar: Werewolf cannot cast a skill which would give them Sacred Ground. So, the +50% bonus should just be baked into the Class Mastery.
- Arcanist: Werewolf cannot generate or consume Crux. So, the Class Mastery should both generate and consume Crux. This would allow Arcanist Werewolf to benefit from the following Class passives they couldn't before:

Thank you for reading this post. I'm really looking forward to the day that Werewolf gets its own Grimoire, and I hope these ideas could help the Scribing team tackle the shortcomings of the current Class Mastery design in regards to Werewolf's limited toolkit.
@ZOS_Kevin @ZOS_JessicaFolsom @ZOS_BrianWheeler
Edited by Erickson9610 on February 25, 2025 4:01PM PC/NA — Lone Werewolf, the EP Templar Khajiit Werewolf
Werewolf Should be Allowed to Sneak
Please give us Werewolf
Skill Styles (for customizing our fur color),
Grimoires/Scribing skills (to fill in the holes in our builds), and
Companions (to transform with).