B.S.

Any time you could cast a sorcery, you may exile
B.S. or another card face down from your hand.
If you do, that card gains, "Any time you could
cast a sorcery, you may gain `10 life and to reveal
a card that could be B.S. that you don't own in
exile. Any player may play this ability."
When this card is revealed in exile, the player revealing it loses 20 life.