The Monastic tradition of the shield specializes in the use of shields in tandem with other monastic abilities. Shield monk prides themselves in the use of the shield, valuing the defense of others as a noble purpose.

Shield Fightning Technique

Starting when you choose this tradition at 3rd level, you gain proficiency in using a shield, your shield is considered a monk weapon and your shield may be used with Unarmored Defense and other monk abilities, without penalty as long as your other hand remains free. Your shield acts like a club it deals 1d6 bludgeoning damage and you gain +1 AC while holding your shield as long as your other hand remains free.

Whenever you hit a creature with one of the attacks granted by your Flurry of Blows, you can impose one of the following effects on that target:

• It must succeed on a Dexterity saving throw or be knocked prone.
• It must make a Strength saving throw. If it fails, you can push it up to 15 feet away from you.

One with the Shield

At 6th level, your ki becomes intertwined with your shield. 

Ki Empowered Protection. You gain the following benefits while 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 effects. At level 11, your shield grants you an additional +2 AC

Ki Entwined Shield.  Your shield damage die increase to 1d8 and 1d10 at level 11. Your attacks with your shield are count as magical for the purpose of overcoming resistance and immunity to nonmagical attacks and damage. Additional, if you wield a magical shield with a bonus, the bonus is added to both your attack and damage rolls. 

Thrown Shield

Beginning at 11th level, your shield can be used as a thrown weapon (with a range of 30/90). If your last attack with the shield misses, it doesn't return to you until the beginning of your next turn, otherwise it returns to you immediately after the last attack, provided you have an empty hand and it has a clear path. Doning and doffing a shield costs you no actions.

You can ricochet your shield for additional attacks against creatures within range using your Extra Attack and Flurry of Blows features, or if you gain additional attacks by other means (such as through haste).

 

True Shield Master

At 17th level, your shield and ki are so entwined you have become a shield. While you are weilding a shield with the other hand free, you gain resistance to all nonmagical damage. You also add your Wisdom modifier to attack and damage rolls made with a shield.