The Librarian

Illusionist Mentor

While The Librarian is face-down in arsenal, at the start of your turn, you may turn him face-up. While The Librarian is face-up in arsenal, once per turn when you create a Spectral Shield token, draw a card and put a lesson counter on The Librarian. Then if there are 3 or more lesson counters on him, banish him, search your deck for a specialization card, put it face-up into arsenal, and shuffle.