Clefable

{x}{b/r}{t} Exile the top card of your library face
up. Starting with you at the combined Converted
Mana Cost. Players will auction life to cast that
card. The losing players will draw 2 cards. Then,
the winning player will cast that card for the
auction price. Repeat X time then Exile this card.
If this card is exiled during this then this effect
ends.
(This can only be activated at sorcery speed.)