Shield Master (Alternate)

You use shields not just to protect yourself, but also others. You gain the following benefits while you are wielding a shield:

• If you aren’t incapacitated, you can add your shield’s AC bonus to any Dexterity saving throw you make against a spell or other harmful effect that targets only you.
• If you are subjected to an effect that allows you to make a Dexterity saving throw to take only half damage, you can use your reaction to take no damage if you succeed on the saving throw, interposing your shield between yourself and the source of the effect. If you do so, creatures in a 10 feet cone behind you are considered to be behind total cover against that effect.