Omenflame Seer

When Omenflame Seer enters and whenever you commit a
crime, exile the top card of your library. Until the end of
your next turn, you may play that card. This ability
triggers only once each turn.

{t}: Omenflame Seer deals 1 damage to any target.

{r}, {t}, Sacrifice another creature: Add two mana in any
combination of colors. Spend this mana only to cast spells
from exile. If the sacrificed creature was a Human,
Omenflame Seer deals 1 damage to any target.