Glorious Defense

You can turn defense into a sudden strike. When you or another creature you can see within 10 feet of you is hit by an attack roll, you can take a Reaction to grant a bonus to the target's AC against that attack, potentially causing it to miss. The bonus equals your Charisma modifier (minimum of +1). If the attack misses, you can make one attack with a weapon against the attacker as part of this Reaction if the attacker is within your weapon's range.

You can use this feature a number of times equal to your Charisma modifier (minimum of once), and you regain all expended uses when you finish a Long Rest.