You know what? I think my secondary character is going to be a Russian that has Santa Claus for a Grimoire. That sounds hilarious. Just need to find a good specific book maybe.

Hol' up, originally I thought it might only be Legendary, but considering the literal worldwide influence in the form of a holiday and massive economic influence as well, is... is Santa Claus actually a Mythic Grimoire? I think it just might be.
On second thought, in terms of global influence, it looks Mythic, but it's far too recent a fairy tale to look like anything more than a Fable. Which means that it sort of averages out as a Legend-type?
Pretty much too young to be Mythic yet, but that has a lot of potential to change long down the line.