Cheapest priced copy (The List): $0.49 at Card Kingdom, near mint, their price list as of .
Ghitu Fire 
Sorcery · Rare · Invasion · #144
You may cast this spell as though it had flash if you pay {2} more to cast it. (You may cast it any time you could cast an instant.)
Ghitu Fire deals X damage to any target.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
2 printings · $0.49 to $10.99 at Card Kingdom
One ruling from Wizards of the Coast
- 4 October 2004The extra 2 mana to cast it as an instant does not count as part of the mana cost.