Rite of the Eternal Flame

Sacrifice an artifact with a converted mana
cost X: Rite of the Eternal Flame does X damage
to target creature. If that creature would go to
the graveyard from the battlefield this turn, exile
it instead and you may add X mana in any combination of colors to your mana pool at the beginning of your next main phase.
"There are two ways of spreading light: to be
the candle or the mirror that reflects it."
- Edith Wharton