Stellah, Storm Summoner

+2: Look at the top card of your library. If it's an instant or sorcery spell, you may cast it (you still pay it's cost). If not, you draw a card.
-X: You may cast target instant or sorcery with converted mana cost X from your hand without paying it's mana cost.
-8: Search your library for three instant and/or sorcery cards, then exile them. Until end of turn, you may cast them without paying their mana cost.