Transfix

For the duration, your appearance becomes otherworldly and alluring. One creature of your choice that you can see within 60 feet of you must succeed on a Charisma saving throw or have the Charmed condition for the duration. While Charmed, the target has the Incapacitated condition, and if the target is more than 5 feet away from you, it moves on its turn toward you by the most direct route, trying to get within 5 feet of you. If the Charmed creature ends its turn within 5 feet of you, it takes 4d8 Psychic damage. The target doesn't avoid Opportunity Attacks when moving toward you, but before moving into damaging terrain (such as lava or a pit), the target repeats the save, ending the spell on itself on a success. Until the spell ends, you can take a Magic action on subsequent turns to target another creature, but you can't target a creature again if it has succeeded on a save against this casting of the spell.

Using a Higher-Level Spell Slot: The damage increases by 1d8 for each spell slot level above 7.