Akroma, Angel of Hate

Flash, Flying, Haste, Double strike, Deathtouch
As an additional cost to cast this spell, pay 6 life
and mill 6 cards.
When Akroma, Angel of Hate enters the battlefield,
it deals 6 damage to each opponent and each
opponent must mill 6 cards and sacrifice 6 nontoken permanents.
If Akroma, Angel of Hate is on the battlefield at the beginning of your endstep, exile it unless you mill 6
cards, sacrifice 6 nontoken permanents and pay 6 life.