Morvous, Spectator of Tragedy

When Morvous enters the battlefield, sacrifice
him unless a creature has died this turn, a player
has discarded a card, or a player lost the game.
Shroud, Skirmisher (This creature can't be blocked
by 2 or more creatures).
Whenever a creature dies, a player discards a card,
or a player loses the game, put a +1/+1 counter
on Morvous.