Boros Fury Shield

A radiant flame barrier of magical force appears and protects you or a single target. Until the start of your next turn, the target has a +3 bonus to AC, including against the triggering attack.  If an attack misses the target, the attacker takes 2D8 Radiant Damage. Additionally, the target must succeed on a Constitution saving throw or be blinded until the spell ends. 

A creature blinded by this spell makes another Constitution saving throw at the end of each of its turns. On a successful save, it is no longer blinded.