Cheapest priced copy (New Phyrexia): $0.35 at Card Kingdom, near mint, their price list as of .
Argent Mutation 
Instant · Uncommon · New Phyrexia · #27
Target permanent becomes an artifact in addition to its other types until end of turn.
Draw a card.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| New Phyrexia | 27 | Uncommon | $0.35 | $0.49 |
2 rulings from Wizards of the Coast
- 1 June 2011You can target an artifact with Argent Mutation. When it resolves, you’ll simply draw a card.
- 1 June 2011If the permanent is an illegal target when Argent Mutation tries to resolve, it won’t resolve and none of its effects will happen. You won’t draw a card.