Catalyst of divinity

Through your will to keep allies safe, you imbue yourself with divine energy which temporarily boosts your reaction time and provides a radiant shield of false life. Gain 2d6 + spell casting modifier temporary hit points. Your range for an attack of opportunity increases to 10ft and does not use your reaction to attack. Instead of a melee attack, you call forth a beam of radiant light which forces all hostile creatures that enter your range to make a charisma saving throw. On a failed save, the creature takes 20 radiant damage and is frightened of you for the current and next round, on a successful save, the creature takes half as much damage and is not frightened.