Carrie, Ramaging Mind

+3: Each player discards a card you draw a card for each card discarded this way you have no maximum hand size until your next turn
-8: Deal 10 damage to target creature or planeswalker if a creature died this way exile it then draw a card and discard a card
-15: Reveal the top 15 cards of your library for each card type you may cast any number of instants or sorceries and copy them for each card type