Mystic General of Markov

Other Vampires you control have double strike.
{2}{b}{b}, Pay 3 life, Discard a card: You control
target player during the next combat phase. (You
see all cards that player could see and make all
decisions for the player.)
There's no secret he can't learn, no stratagem he can't
unravel. He'll find your weakness and show you the
torrent that can pour through a pinhole.