Clockstopper

When an attack roll is made against you or you are required to make a dexterity saving throw, make an intelligence saving throw with a DC equal to the attack roll or the dexterity saving throw’s DC. On a success, time slows down to a crawl to all but you, and you automatically succeed in dodging the attack. If it is an attack that would normally make you take half damage in a success, you take none. Additionally, if you succeed the roll by 5 or more you may take an opportunity attack.