Cheapest priced copy (Double Masters 2022): $0.69 at Card Kingdom, near mint, their price list as of .
Dragon Arch 
Artifact · Uncommon · Double Masters 2022 · #305
{2}, {T}: You may put a multicolored creature card from your hand onto the battlefield.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
2 printings · $0.49 to $15.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Double Masters 2022 | 305 | Uncommon | $0.69 | $0.49 |
| Apocalypse | 135 | Uncommon | $0.99 | $15.99 |
2 rulings from Wizards of the Coast
- 4 October 2004A multicolored card has more than one color in its mana cost.
- 1 May 2007Putting the card onto the battlefield is optional. When the ability resolves, you can choose not to.