Dominate Soul

You touch a soul cage, which can be a tiny silver cage, a gem, a crystal, a reliquary, or some other ornamental container worth at least 500 gp, and command one of the souls it contains to do your bidding.  The soul can be of a level or challenge rating no higher than your current level.  The dominated soul appears as a shimmering, ghost-like creature wielding ectoplasmic versions of the weapons and armor it carried in life and has the same stats and abilities.  The creature acts on its own initiative, but follows your commands, though possibly unwillingly.

As a bonus action on each of your turns, you can mentally command the creature if it is within 120 feet of you (if you control multiple creatures, you can command any or all of them at the same time, issuing the same command to each one). You decide what action the creature will take and where it will move during its next turn, or you can issue a general command, such as to guard a particular chamber or corridor.  If you issue no commands, the creature only defends itself against hostile creatures.  Once given an order, the creature continues to follow it until its task is complete.

The creature is under your control for the next 24 hours, or until you dismiss it, unless it succeeds on a wisdom saving throw to escape your control.  If the creature is hostile to you, it can make the saving throw every hour.  On a successful save, the soul frees itself of your command and acts as it desires.  The spirit remains in the physical world as long as you retain concentration.  You can end your concentration on the creature to dismiss it, at which point it returns to the soul gem.  If you lose your concentration involuntarily, the creature immediately makes a Wisdom saving throw to escape your control.  If it fails the saving throw, the soul is returned to the soul gem as if you had dismissed it.

If there are no souls in the cage when this spell is cast, nothing happens and the spell slot is consumed as usual.