Karveen, God of Lies

Indestructible, deathtouch
As long as your devotion to blue and black is less than seven, Karveen, God of Lies isn't a creature. Creatures you control that are not
owned by you have a casting cost of {b}{u}.
{2}{u}{b}: Gain control of target creature, unless its controller puts the top three cards of his or her library into his or her graveyard.