Cheapest priced copy (The Brothers' War Commander): $0.49 at Card Kingdom, near mint, their price list as of .
Etched Champion 
Artifact Creature — Soldier · 2/2 · Rare · Scars of Mirrodin · #154
Metalcraft — This creature has protection from each color as long as you control three or more artifacts.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
3 printings · $0.49 to $8.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| The Brothers' War Commander | 140 | Rare | $0.49 | — |
| Modern Masters 2015 | 209 | Rare | $0.69 | $4.49 |
| Scars of Mirrodin | 154 | Rare | $0.69 | $8.99 |
One ruling from Wizards of the Coast
- 1 January 2011"Protection from all colors" means protection from white, from blue, from black, from red, and from green. (In other words, it doesn't just mean "protection from objects that have all five colors.")