Utori, Witch of Violence

Haste, Vigilance, Indestructible.
Utori cannot be countered.
As you cast Utori you may pay x and exile x
cards from the top of each players library,
Utori gets +x/+x for each card in exile, where
x is the number of cards in exile for each
player.
Whenever Utori attacks, Utori deals damage
equal to her power to each player.