Cheapest priced copy (Commander 2016): $0.35 at Card Kingdom, near mint, their price list as of .
Quirion Explorer 
Creature — Elf Druid Scout · 1/1 · Common · Commander 2016 · #160
{T}: Add one mana of any color that a land an opponent controls could produce.
Legal inCommanderLegacyVintagePauper
Not legal inBrawlStandardPioneerModern
2 printings · $0.35 to $2.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander 2016 | 160 | Common | $0.35 | — |
| Planeshift | 90 | Common | $0.35 | $2.99 |
One ruling from Wizards of the Coast
- 1 August 2008If the opponent only has lands that produce colorless or no mana, this card’s ability can still be activated; it just won’t produce any mana.