Voporal, Warmaker

Double Strike, Reach
Damage dealt by Voporal to demons has deathtouch.
When Voporal enters the battlefield, destroy target
creature or artifact with converted mana cost 3 or less.
Dash {4}{g}{r}(You may cast this spell for its dash cost. If
you do, it gains haste, and it’s returned from the battlefield to
its owner’s hand at the beginning of the next end step).

"How many coins does it take to kill him?"