Cheapest priced copy (Scars of Mirrodin): $0.35 at Card Kingdom, near mint, their price list as of .
Auriok Sunchaser 
Creature — Human Soldier · 1/1 · Common · Scars of Mirrodin · #4
Metalcraft — As long as you control three or more artifacts, this creature gets +2/+2 and has flying.
Legal inCommanderModernLegacyVintagePauper
Not legal inBrawlStandardPioneer
1 printing · $0.35 to $0.79 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Scars of Mirrodin | 4 | Common | $0.35 | $0.79 |
2 rulings from Wizards of the Coast
- 1 January 2011If Auriok Sunchaser blocks a creature with flying, causing it to lose flying (by destroying an artifact its controller controls, for example) won’t change that.
- 1 January 2011For the purposes of blocking (either because Auriok Sunchaser is attacking or because a creature with flying is attacking Auriok Sunchaser’s controller), whether Auriok Sunchaser has flying is checked only as the declare blockers step begins.