gargoyle head wrench

haste. defender flying
when gargoyle head wrench enters the battlefield, choose a random card from your opponent's hand (without looking) the opponent exiles the card
face down, the opponent can look at that card at
any time and can cast that card with face down
paying its cost by paying {4} more. at the start of
the exiled card's owner's upkeep if he has 4 or
more madness counters and hasn't cast his exile
card, he loses 1 life.