Krleff, Maddening Pyrofrenzy

Expel {5} (If you would roll this card from the Chaos
Library, instead, exile it. As long as it remains exiled,
you may cast it for it's expel cost)

{t}: Krleff, Maddening Pyrofrenzy deals 5 damage
to any target. Add 5 mana in any combination of {g} and {r} to your mana pool.
{r/g}, Discard a card: Destroy target land, artifact or enchantment. Activate only as a sorcery.