Wrath of the Burning Hells

Each player draws three cards and discards four cards at random. Add {r} to your mana pool for each land card discarded in this way. If you control at least four Mountains, double the number of cards drawn and discarded in this way.
Until end of turn, gain control of all graveyards and you may cast cards in your graveyards, spending red mana as though it were mana of any colour to pay costs of cards in graveyards this turn.