Cheapest priced copy (Mirrodin): $0.39 at Card Kingdom, near mint, their price list as of .
Tooth of Chiss-Goria 
Artifact · Common · Mirrodin · #264
Flash
Affinity for artifacts (This spell costs {1} less to cast for each artifact you control.)
{T}: Target creature gets +1/+0 until end of turn.
Legal inCommanderModernLegacyVintagePauper
Not legal inBrawlStandardPioneer
1 printing · $0.39 to $3.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Mirrodin | 264 | Common | $0.39 | $3.49 |