Dark Shadow

You point at an enemy creature and cast the spell. 

The enemy creature is engulfed in swirling shadows and the targeted creature has to make a Wisdom saving throw. On a failure, the creature falls unconscious.

Whether the save succeeds or fails, the shadows form a figure with the same outer form as the targeted creature, but it consists completely out of black shadows. It has the same stats (AC, HP, weapons) as the targeted creature; it also copies special abilites (subclass features) but it cannot cast any spells. Immediately after forming it drifts to a place within a range of 20 feet from its creation. The shadow is friendly to you and your companions for the duration; roll initiative for the shadow, which has its own terms. It obeys any verbal commands that you issue to it (no action required by you). If you don't issue any commands to the shadow, it will attack the nearest enemy creature.

If the shadow gets reduced to zero hitpoints or you are knocked unconscious, the shadow disappears. If your concentration is broken, the shadow disappears as well. If the targeted creature fell unconscious, it wakes up as soon as the shadow disappears.