Jaina, Magic Incarnate

+2: Jaina deals 5 damage, divided evenly, rounded down, among any number of target creatures and/or players.
-3: Scry 2, then draw 2 cards. Until end of turn, instants and sorceries you cast cannot be countered and damage cannot be prevented.
-10: Jaina deals X damage to each opponent, where X is the total number of noncreature spells in all graveyards and in exile.