TFPH - Death's Head

Death itself gazes out from your face.

Your face becomes a terrifying, fleshless visage of bones and viscera for the spell's duration. One creature of your choice within 30 feet of you, that can see you must succeed on a Wisdom saving throw or become frightened of you for one minute. A frightened creature may make another saving throw at the end of each of its turns. If it fails the saving throw against this spell three times, it remains frightened for the duration of the spell.

On each of your turns until the spell ends, you can use your action to target another creature but can't target a creature again if it has succeeded on a saving throw against this casting of Death's Head.