Flare

You can interpose blinding light between yourself and an attacking enemy. When you are attacked by a creature within 30 feet of you that you can see, you can use your reaction to impose disadvantage on the attack roll, causing light to flare before the attacker before it hits or misses. An attacker that can't be blinded is immune to this feature.

You can use this feature once per combat encounter. This feat is for spell-casters only, and must have their INT, CHA or WIS equal to 16 or above.