Bind Undead

With this spell, you attempt to bind an undead creature to your service. The creature must be within range for the entire casting of the spell. At the completion of the casting, the target must make a Charisma saving throw. On a failed save, it is bound to serve you for the duration. If the creature was summoned, animated or created by another spell, that spell's duration is extended to match the duration of this spell.

A bound creature must follow your instructions to the best of its ability. You might command the creature to accompany you on an adventure, to guard a location, or to deliver a message. The creature obeys the letter of your instructions, but if the creature is hostile to you and intelligent, it strives to twist your words to achieve its own objectives.

At Higher Levels. When you cast this spell using a spell slot of a higher level, the duration increases to 10 days with a 5th-level slot, to 30 days with a 6th- level slot, to 60 days with a 7th-level slot, to 180 days with an 8th-level slot, and to a year and a day with a 9th-level spell slot.