Cheapest priced copy (Magic 2012): $0.35 at Card Kingdom, near mint, their price list as of .
Scepter of Empires 
Artifact · Uncommon · Magic 2012 · #216
{T}: This artifact deals 1 damage to target player or planeswalker. It deals 3 damage instead if you control artifacts named Crown of Empires and Throne of Empires.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
1 printing · $0.35 to $3.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Magic 2012 | 216 | Uncommon | $0.35 | $3.49 |
2 rulings from Wizards of the Coast
- 22 September 2011Whether or not you control the correct artifacts is determined when the ability resolves.
- 22 September 2011If any of the named cards stops being an artifact, it won't be considered by these abilities.