Cheapest priced copy (Adventures in the Forgotten Realms): $0.35 at Card Kingdom, near mint, their price list as of .
Mimic 
Artifact — Treasure · Common · Adventures in the Forgotten Realms · #349
{T}, Sacrifice this artifact: Add one mana of any color.
{2}: This artifact becomes a Shapeshifter artifact creature with base power and toughness 3/3 until end of turn.
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
3 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Adventures in the Forgotten Realms | 249 | Common | $0.35 | $0.49 |
| Adventures in the Forgotten Realms | 349 | Common | $0.35 | $0.49 |
| The List | AFR-349 | Common | $0.35 | — |
2 rulings from Wizards of the Coast
- 23 July 2021Mimic is still a Treasure after its last ability resolves, but Treasure is an artifact type, never a creature type.
- 23 July 2021If an effect refers to a Treasure, it means any Treasure artifact, not just a Treasure artifact token.