Chaos field

You call upon the forces of chaos upon your enemies. A 60 feet chaos field is created and disrupts the flow of mana within the field. Every creature within the field must make a WIS saving through; on a successful save, the creature gains immunity from being affected by chaos and is able to cast spells as per normal. On a failed save, the creature gains a disadvantage when casting a spell until the chaos field ends. (If the spell casted by the creature requires other creatures to make a saving throw, the other creature gains an advantage in their saving throws.)