Dread Carapace

 You surround yourself with a thick black shell that shimmers with dark magic. Until the spell ends, you gain a +2 bonus to Armor Class and Constitution saving throws, and whenever a creature ends its turn within 5 feet of you, it must make a Wisdom saving throw unless it is immune to the frightened condition. On a failure, you can push the creature up to 15 feet away from you, and it is frightened of you until the end of its next turn. On a success, you can push the creature up to 10 feet away from you.

For the spell's duration, you also suffer disadvantage on Charisma (Persuasion) checks.