Umbral Disjunction

You perform a necromantic ritual, severing the shadow of the corpse of a Small or Medium creature and raising it as an undead Shadow under your control. 

In combat, the Shadow shares your initiative count, but takes its turn immediately after yours. It obeys your verbal commands (no action required by you). If you don't issue any, it takes the Dodge action and uses its move to avoid danger. Additionally, you can command the Shadow not to spawn another Shadow out of a creature slain by it's Strength Drain attack. 

The Shadow is under your control for 24 hours, after which it stops obeying any commands you've given it. To maintain control of the Shadow for another 24 hours, you must cast this spell on the Shadow again before the current 24-hour period ends. This use of the spell reasserts your control over up to four Shadows you have created with this spell, rather than animating a new one.

At Higher Levels: When you cast this spell using a spell slot of 5th level or higher, you create or reassert control over two additional Shadows for each slot above 4th level. Each Shadow much come from a different corpse.