Flesh Furnace

When Flesh Furnace enters the battlefield,
exile all nonartifact creature cards from your
graveyard, then put X fuel counters on Flesh
Furnace, where X is half the number of cards
exiled this way, rounded down.
Sacrifice a nonartifact creature: Put a fuel
counter on Flesh Furnace.
Remove a fuel counter from Flesh Furnace:
Add {c}{c}.