Martial Deflection

Your mastery with weaponry has given you insight into critical moments in enemy attacks, providing the following benefits.

• Increase your Dexterity or Strength score by 1, to a maximum of 20. 
• When a creature within 5 feet of you makes an attack against a target other than you, and before you know if the attack hits, you may use your reaction to make a melee weapon attack against the attacking creature. If your attack role is higher than the attacking creature's, their attack misses and they take full damage from your strike. If your attack hits but is less than the targets attack role, your strike does half damage and their attack is unaffected.