Bond Hexwraiths

This spell bonds together a nightmare and a deathlock wight to serve as a hexwraith loyal to you. Choose 3 piles of bones or corpses of Medium or Small humanoids within range. Your spell marks the targets with dark energy, causing them to act as a lure as 3 nightmares come from the lower planes, hungry for each corpse which you have now doubled the flavor of for them. At the same time, that marker extended to the soul that each body belonged to, therefore also calling them back, although making them a dark and twisted undead spirit of their former selves. The spirits will then ensnare the nightmares for eating their corpses, conquering them, and seeing you as the one who made them able to come back and get revenge for their corpses. These pairings are called hexwraiths, and each use the stat block of a deathlock wight riding a nightmare. The creatures die if they dismount fully in any way, and they are aware of this. The wight’s self targeting spells extend to the nightmare as well.

On each of your turns, you can use a bonus action to mentally command any creature you made with this spell if the creature is within 60 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 24 hours, after which it stops obeying any command you've given it. To maintain control of the creature for another 24 hours, you must cast this spell on the creature again before the current 24-hour period ends. This use of the spell reasserts your control over up to three creatures you have animated with this spell, rather than animating new ones.

This spell is affected by Undead Thralls, but is not given automatically like Animate Dead is.