Mega-Negaduck

+3: Exile target permanent. Its controller mills X cards, where X is the exiled card's converted mana cost.
-3: Each player discards their hand, then draws cards equal to the greatest number of cards discarded this way and loses that much life.
-12: Exile all permanents on the battlefield, then return them to the battlefield under your control. Exile Mega-Negaduck.