Rennala, Full Moon Queen

+2: Rennala, Full Moon Queen can't be targeted by an attack, instant or enchantment until the beggining of your next turn.
-4: Put two +3/+2 Rennala's Librarian creature tokens onto the battlefield and draw a card.
-8: Deal damage to the target player, planeswalker or creature equal to the number of Librarians in play.