Mckenna, Grave Sorceress

When Mckenna, Grave Sorceress enters the battlefield, exile all nonland, noncreature cards from each graveyard.
{b}{t}:Choose target creature at random from target opponent's graveyard. Put that card onto the battlefield under your control.
"You might think your skills compare to mine, but trust me, you haven't seen a inch of my power!"