Cranial Torment

Commemorate {2}{b}{b} (You may cast this spell as
an instant for its commemorate cost. If you do, remove
the words in square brackets.)
[When Cranial Torment enters the battlefield,]
all creatures get -2/-2 until end of turn[ X times].
[Whenever a creature an opponent controls
dies for the first time each turn, that player
discards a card.]