Minimus Containment

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.)

Alchemy Horizons: Baldur's Gate

Commander Legends: Battle for Baldur's Gate

Adventures in the Forgotten Realms

A 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).

If an effect refers to a Treasure, it means any Treasure artifact, not just a Treasure artifact token.

The enchanted permanent still retains its name, colors, mana cost, and mana value. It isn't a token unless it already was one.