Way of the Boulder

Solid Body At 3rd level, you have learned to use your body weight to empower your strikes. You may use your Constitution modifier in place of your Dexterity modifier when calculating your Unarmored Defense and for both the attack and damage rolls for any Martial Arts attacks. Additionally, as a reaction you can spend a ki point to grant yourself advantage on Strength (athletics) checks to resist being grappled or moved against your will. Rebounding Defense At 6th level, you can use your reaction to absorb or reflect an incoming melee attack. When you do so, the damage you take from the attack is reduced by 1d10 + your Constitution modifier + your monk level. If you reduce the damage to 0, you can rebound the attack back at the enemy creature. If you rebound in this way, you can spend 1 ki point to force the enemy creature to make a Strength saving throw. On a failure, they take the full damage of their own melee attack. Thick Fat At 11th level, your dense physical form lets you resist physical and elemental assaults. As a reaction to taking bludgeoning, slashing, acid, cold, fire, poison, lightning, or thunder damage you can spend 1 ki point to gain resistance to that damage type for the next minute. You can only be resistant to one damage type at a time in this way, and if you use this ability again to gain resistance to a different damage type, the first damage resistance immediately ends. Mighty Form At 17th level your body has surpassed the normal mortal limits of density and mass. Your Constitution score increases by 2. You maximum Constitution score is now 22. Additionally, you now count as a large creature for the purposes of everything except physical size.