Mayhem Demon

Flying
Spectacle {1}{b}{r} (You may cast this spell for its
spectacle cost rather than pay its mana cost if an
opponent lost life this turn.)
At the beginning of your upkeep, each opponent
discards a card at random, then draws a card.
Then, if there are five or more cards in an
opponent's graveyard, put a +1/+1 counter
on Mayhem Demon.