Sozin's Comet - 154 - (Prerelease Cards)

Each creature you control gains firebending 5 until end of turn. (Whenever it attacks, add RRRRR. This mana lasts until end of combat.)
Foretell 2R (During your turn, you may pay 2 and exile this card from your hand face down. Cast it on a later turn for its foretell cost.)