Bhrian, Truth Professor

Partner
Flying
Bhrian, Truth Professor enters with {x} +1/+1 counters on it.
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!"