Paragon of Iron

You’ve trained in the effective use of shields. You gain the following benefits:

• When a creature you can see attacks a target other than you that is within 5 feet of you, you can use your reaction to add your proficiency bonus to the target's AC for that attack, potentially causing the attack to miss. You must be wielding a shield.
• If you take the Attack action on your turn, you can use a bonus action to try to shove a creature within 5 feet of you with your 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.