Urza, Planeswalker

+1: The next planeswalker spell you cast this turn costs {1} less to cast. Proliferate.
-3: Tutor for a planeswalker card to your hand. (Search your library for a planeswalker, reveal it, put it in your hand, then shuffle your library.)
-9: Tutor for any number of planeswalker cards to the battlefield. This card can be your commander.