Way of the Stone Fist.

Way of the Stone Fist

Some monks seems to have flesh as strong as iron or stone. Capable of shattering wood or stone blocks of remarkable thickness with ease using steely fist or foot alone. Possessing corded muscles so hard, that punching them feels like striking a brick wall. 

Monks of the Way of the Stone Fist rely on physical strength much often than monks of most tradition. Unconcerned with maximising their agility, or agility to react quickly, they instead patiently determine the best place and time to connect a blow, shattering bone and pulping muscle and organs with disturbing ease using their rock-hard extremities.

Bonus Proficiency

When you choose this tradition at 3rd level, you gain proficiency in the Athletics skill if you don't have it. Your proficiency bonus is doubled for any ability check you make that uses Athletics skill.

Hardened Defence

While training to harden your fists and feet, you've learned to use those extremistis defensively, in a manner simular to how Shields are used by others. You gain a +1 to your AC while you are wearing no armor and not wielding a shield.

Stone Fist Technique

At 3rd level, your fists and feet, constantly used against hard surfaces to strengthen it as part of your ongoing training, grow stronger than stone. Your unarmed strikes deals double damage to objects and structures, and you have advantage on attack rolls with your unarmed strikes against objects and structures.

Additionally, like every member of this monastic tradition, you have two decisions  to make upon unlocking the secrets of the stone fist technique, choosing whether or not to refocus your ki so powerfully in a single moment, that you change your physique forever.

When you gain this feature at 3rd level, you must choose whether or not to  become stronger, at the cost of  becoming less dextrous.  You may immediately move any number of points of your Dexterity over to your Strength. You can't yet move any points of Dexterity you've gained because of the Ability Score Improvement class feature in this manner, or from any magic items.  Your Strength score can't become greater than 17, and Dexterity lower than 8. Then, if you have any instances of increasing your Dexterity with an Ability Score Improvement class feature, you may immediately any number of those over to your Strength, which can make the score greater than 17.

After making the choice to adjust your Strength and Dexterity ability score, you must then decide whether or not you wish to now use Strength instead of Dexterity to determine your AC with your Unarmored Defense monk feature, and you add your Strength modifier rather than Dexterity modifier to determine how much you reduce damage from a ranged missile attack with your Deflect Missiles features.

Note: Both of these decisions can't be reversed, and can't be decided upon later. Once you commit yourself to the Way of the Stone Fist monastic tradition you must choose, and whether you choose to adjust Strength and Dexterity ability score or not, and whether or not you'll use Strength from now on for those two class features. Once made, those decisions are permanent.

Stone Body

Starting at 6th level, your fighting style teaches you the stability of stone throughout your body, allowing you to control your center of gravity and tense rock-hard muscles at precisely the right moment to  stay in the fight. You gain the following benefits.

Low Center of Gravity. When you are moved against your will (such as pushed), you may reduce the distance you are moved by up to 10 feet. You have advantage on savings throws to avoid being moved against your will or knocked prone.

Rock-Hard Physique. When you take bludgeoning, piercing, or slashing damage, you can spend 1 ki point as a reaction to halve that damage against you.

Stone Soul

At 11th level, your ki is particularly intertwined with your hardened flesh. When you make a Strength or Construction ability check or saving throw, you may spend 1 ki point to have advantage on that roll. If you reroll this ability check or saving throw, you reroll both dice instead of only one die.

Faultless Technique

At 17th level, your steady and patient honing of the technique has left it without flaw, limited only by you own luck and skill rather than external influences. Your unarmed strikes ignore disadvantage, and ignore resistance and immunity to bludgeoning damage.