Undead Phantasmagoria

You create a psychedelic illusion of dancing skeletons that magically captivate those with 15ft. Each creature in the area who sees the illusion must make a Wisdom saving throw. On a failed save, the creature becomes charmed for the duration. While charmed by this spell, the creature is incapacitated and has a speed of 0.

When the charmed effect on the creature ends (by means of taking damage, being shaken as an action or by the spell ending) they must make a second Wisdom saving throw. On a failed save, the creature becomes frightened of the illusionary undead until the beginning of its next turn.