Alathar's undead dance troupe

When you cast this spell point your palm at the ground, then raise it up to the sky, and then draw an air circle to activate the spell. Summon 6 illusory undead that dances and all creatures within 60 feet of the caster have to make a Charisma saving throw of, on a success nothing happens, on a failure they take 4d6 necrotic damage, and for every point of damage dealt, the caster heals that much. Any creature killed by this spell comes back as a skeleton with proficiency with the performance skill.