Bhrian, Truth Professor

Partner
Flying
Bhrian, Truth Professor’s power and toughness are each equal to the value of {x} in its mana cost.
Once each turn, if you have cast both a white spell and a blue spell this turn, you may search your library for a card, reveal it, and put it into
your hand. Then shuffle.
If Bhrian, Truth Professor would be put into a graveyard, put it on top of your library instead.
—"Buy singles!"