Cheapest priced copy (Adventures in the Forgotten Realms): $0.35 at Card Kingdom, near mint, their price list as of .
Minimus Containment 
Enchantment — Aura · Common · Commander Legends: Battle for Baldur's Gate · #34
Enchant nonland permanent
Enchanted permanent is a Treasure artifact with "{T}, Sacrifice this artifact: Add one mana of any color," and it loses all other abilities. (If it was a creature, it's no longer a creature.)
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
3 printings · $0.35 to $0.79 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Adventures in the Forgotten Realms | 24 | Common | $0.35 | $0.79 |
| Commander Legends: Battle for Baldur's Gate | 34 | Common | $0.35 | $0.49 |
| The List | CLB-34 | Common | — | — |
3 rulings from Wizards of the Coast
- 23 July 2021If an effect refers to a Treasure, it means any Treasure artifact, not just a Treasure artifact token.
- 23 July 2021A creature enchanted with Minimus Containment stops being a creature. Equipment attached to that creature become unattached. Auras attached to that creature will be put into their owner's graveyard (unless they could also enchant a Treasure artifact).
- 23 July 2021The enchanted permanent still retains its name, colors, mana cost, and mana value. It isn't a token unless it already was one.