Channel Sparks

Madness {x}{R}{R}{R} (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.) Exile the top four cards of your deck, until the end of your next turn you may play those cards, except they cost {1} less to cast. If Channel Sparks madness cost was paid, they cost X less instead.