Brennan, the Wise

+1: You may search your library for a basic land card, reveal it, then shuffle your library and put that card on top of it.
0: Target land you control become the basic land type of your choice until end of turn.
-1: Brennan becomes a 1/2 Green elf creature with "tap: add one mana of any of any color to your mana pool" until your next turn.