For Silversnowi
User can use magic and summon books they need

Pros:
-user can use magic without books
-user can learn many spells over time
-user can request teachers from the souls of previous user
-user can summon any book and magic they need
-user has a close to infinite amount of magic
-magic is natural for user

Cons:
-user will be wildly out of control without training
-user will have a large mental strain with too much first
-user cannot physically interact with pervious users
-user may randomly summon books and magic
-user must eat specific foods for different magics

Weakness: corruption
User will grow out of control as they have no access to magic or teachers

Quirk appears once every generation with few living knowledge of how to use quirk properly