Cheapest priced copy (Khans of Tarkir): $0.49 at Card Kingdom, near mint, their price list as of .
Ghostfire Blade 
Artifact — Equipment · Rare · Ugin's Fate · #220
Equipped creature gets +2/+2.
Equip {3}
This Equipment's equip ability costs {2} less to activate if it targets a colorless creature.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
2 printings · $0.49 to $2.79 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Khans of Tarkir | 220 | Rare | $0.49 | $0.49 |
| Ugin's Fate | 220 | Rare | $2.79 | — |
One ruling from Wizards of the Coast
- 20 September 2014Face-down creatures and most artifact creatures are colorless.