Markus Velafi

When Markus Velafi enters the battlefield, exile the top X cards of target players library, then you may flip X coins. You may play cards exiled this way that have converted mana cost equal to or less than the number of coin flips you won without playing their mana costs until end of turn, then put the rest into their owners graveyard.
"The devils in the details, but you won't find many here."