Phenax, Hidden Heart

Indestructible
As long as your devotion to black and blue is less
than seven, Phenax isn't a creature.
{2}{u/b}{u/b} {t}: take four cards from the top of target opponent's library. Exile two face down and
reveal the other two. The opponent chosen
chooses one card from each group and puts it
into their hand. The rest go into their
graveyard.