Chandra, the Hostile

+2: Draw a card, then discard a card. Chandra, the Hostile deals 1 damage to each creature.
0: Search your library for a card named Hostility and reveal it. Then shuffle your library and put that card on top.
-7: You get an emblem with "If a spell you control would deal damage to an opponent, prevent that damage. Create a 3/1 red Elemental creature."