Heh... I'm kind of thinking along the terms of Magic the Gathering, but how about:
Librarian
Follower
Symbol: Moon
Ability: Your hand size limit becomes 8. You still only draw up to your Wits each turn.
Effectively, you can still only draw X=Wits number of cards per turn. However, if at the start of your next turn, you can draw X again, up to a maximum of 8 cards. It seems pretty weak at first, but being able to hold cards beyond your Wits limit would be incredible for fight-based characters. Librarian would also considerably dampen the pain of 'dead draws'.