Way of the Earthen Fist

Four elements cannot be mastered in a single lifetime, but one element is a much more manageable feat. As an Earthfist monk, you have dedicated your life to forming a rock hard defence and enhancing your blows with devastating force. 

You gain access to Earth themed spells at (3 at 3rd, 3 at 6th, 2 at 11th, and 1 at 17th level) that you can cast using ki points. The cost of ki points is detailed in the Earthen Magic section of the Earthen Fist features page. 

Tremorsense

Years of walking and striking stone precisely with your bare feet has trained you to sense vibrations through the earth within a short distance. You cannot be surprised by a creature moving within 30 feet of you, and you can perceive your surroundings even within magical darkness for 30 feet. 

You are also able to pick up on subtle differences in the way a creature's feet have stricken the earth if the tracks were made within 2 hours ago and have not been covered by rain, snow, etc. You have advantage on perception checks when tracking. In addition, if an enemy is fleeing combat and is within 30 feet from you, you can use this feature to predict its path of movement. 

Punishing blows

Your iron body training has strengthened your hands and feet so that they may deal additional damage to foes. Your martial arts die increases to 1d8, 1d10 at level 11, and 1d12 at level 17. 

(Punishing blows replaces unarmed attack. It does not require ki points, it is not an additional attack, it just replaces it. Unarmed attack will still show up in your actions but feel free to ignore it. I can't get unarmed attack to go away but I'll try to update it if I get that fixed)

Earthen Magic

You have spent years of training, pouring energy from every cell in your body into the earth beneath your feet, and the earth giveth back to you in the form of Earthen Magic. 

You know the Mold Earth cantrip, and can cast Earth Tremor and Maximillian's Earthen Grasp at will.

Earthen Magic

You are now able to cast more powerful Earthen Magic. You can cast Erupting Earth, Stoneskin, and Stoneshape at will.

Geoshift

You have learned to channel your ki into surfaces as far as 30 ft away from you. If an enemy within 30 ft of you makes a melee, ranged, or spell attack against you or a party member, you can use a reaction to suddenly shift the earth beneath their feet, imposing disadvantage on the attack. 

You can use this feature a number of times based on your dexterity modifier (minimum 1), you regain all expended uses after a long rest. 

You also have the ability to use your geoshift offensively. When you take the attack action on your turn, you have the option of performing a melee attack with punishing blow, or a ranged attack using geoshift. By propelling your hands or feet into the ground, you can cause a fist or foot formed of rock to exit the ground at a point you can see within 30 ft. A geoshift attack uses the same martial arts die as Punishing Blows. You can use the ranged attack feature an unlimited number of times.

Iron Body

Training every every inch of your body to withstand brutal punishment has enabled you to take blows that would knock even the strongest of mortal men on their backs. You gain a permanent +2 to your AC when not wearing armor or carrying a shield. 

Enhanced Earthen Magic

Your mastery of Earthen Magic is almost complete. You can now cast Wall of Stone, Bones of the Earth, and Transmute Rock at will.

Superior Earthen Magic

Your mastery of Geomancy is complete, the cost of using your Earthen magic has been reduced by 1 ki point for all spells. You also gain access to the Earthquake spell, which you can cast once per long rest.