FOILCheapest priced copy (New Phyrexia): $2.49 at Card Kingdom, near mint, their price list as of .
Myr Superion 
Artifact Creature — Myr · 5/6 · Rare · DCI Promos · #75
Spend only mana produced by creatures to cast this spell.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
2 printings · $2.49 to $7.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| DCI Promos | 75 | Rare | — | $7.99 |
| New Phyrexia | 146 | Rare | $2.49 | $4.49 |
2 rulings from Wizards of the Coast
- 1 June 2011Mana produced by abilities of creature cards not on the battlefield, such as Chancellor of the Tangle or Elvish Spirit Guide, can’t be used to cast Myr Superion.
- 1 June 2011Myr Superion can be cast only with mana produced by the abilities of one or more creatures on the battlefield (such as Alloy Myr or Priest of Urabrask in this set).