Soul of Flame

Discard a card: Add {r}.
{r}: Exile the top card of your library. You may play it this turn. Activate this ability only if you have no cards in hand.
"My candle burns at both ends;
It will not last the night;
But ah, my foes, and oh, my friends-
It gives a lovely light!"
First Fig - Edna St. Vincent Millay