Jace, Brainless Mind Servant

When Jace, Brainless Mind Servant enters the battlefield sacrifice him unless you control a
mono black planeswalker.
{u}{u}{u} Exile Jace, Brainless Mind Servant: Target player puts the top ten cards from his or her library into his or her graveyard.
"Oh my dearest Jace you could have done better. Oh well at least now you can serve me in death!"
- Liliana Vess