Cheapest priced copy (Mirrodin Besieged): $0.35 at Card Kingdom, near mint, their price list as of .
Into the Core 
Instant · Uncommon · Mirrodin Besieged · #67
Exile two target artifacts.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Mirrodin Besieged | 67 | Uncommon | $0.35 | $0.49 |
One ruling from Wizards of the Coast
- 1 June 2011You must be able to target two different artifacts in order to cast Into the Core.