The Final Countdown

Suspend 3 -- {b}{b}{r}{r} (Rather than cast this card from your hand, you may pay {b}{b}{r}{r} and exile it with 3 time counters on it. At the beginning of your upkeep, remove a time counter. When the last is removed, cast it without paying its mana cost.)
At the end of each opponent's next end step, that player sacrifices 5 permanents, loses 5 life and discards 5 cards.