Mirror of Duplication

Wondrous item, very rare

This mirror functions like a mirror of life trapping with an additional potent power. As an action, you can use the mirror to create a double of one of the creatures trapped within. The creature has all of the knowledge and memories of the trapped creature, as well as its hit points and statistics, but no spellcasting or other class features. The creature is under your control as long as you concentrate. When not concentrating, the creature appears dull and listless. You can have as many duplicates as there are creatures trapped in the mirror, but you can only concentrate on one at a time.