Undersea Minefield

At the beginning of your upkeep, entrap the top card of your library. (Put the card onto the battlefield face down as a colorless 0/1 Mine artifact creature token with defender and "When this creature dies, instead flip the card and cast without paying its mana cost. All players cannot peek under the entrapped card.)
"Only those who experiment with pyrotechnics do not believe this creation to be an abomination."
~Kresh, walker of Dronain