Deadly Babbling

'Talk yourself to death.'

Choose a creature that you see in range. The target must make a Wisdom save or begin yelling incomprehensible speeches for the duration. A creature that can't speak languages automatically passes the save. While a creature's affected this way, it can't take actions, reaction, bonus actions, or move. At the start of each of its turns, each other creature within 40ft of it that can hear it blabbering must make a Wisdom save or take 4d8 psychic damage, or half as much on a success. At the end of each of its turns, the target can make another Wisdom save. On a success, the spell ends.