Inflict Paranoia

You magically shatter your enemies’ comradery. Each target that fails has disadvantage on saving throws against being frightened and will not directly support an ally. For example, they will continue to fight, but not cast enhancement or healing spells on their allies, share resources with them, provide cover, or use the Help action. If a creature is already supporting an ally in this way, such as concentrating on a spell, it will immediately stop. A creature can repeat the saving throw at the end of each of its turns, ending the spell’s effects on it on a successful save.