Path of the Rumbling Earth

You have become spiritually connected to the ground itself, feeling its every movement flow through you. Your strides are heavy and enemies waver as you approach them, the ground shaking beneath them. Enemies in your close proximity struggle to keep standing while you leap into the air and quake the ground as you land.

Ground Stomp

As you land from a jump, the nearby ground shakes under the impact. Starting at 3rd level, while raging, when you land from a running long jump or a running high jump, you can immediately use your bonus action to make a Ground Stomp before continuing to move or taking an action this turn. If you do, enemies within 5 feet of your landing position must succeed on a Strength (Athletics) or Dexterity (Acrobatics) check DC 8 + your proficiency bonus + your Strength modifier or be knocked prone and take 1d6 force damage.

Surefooted

You have become well adapted to keep your balance and grown stronger to jump long distances with ease. Starting at 6th level, you can move across difficult terrain made of earth or stone without expending extra movement. You can make a running long jump or a running high jump after moving only 5 feet on foot, rather than 10 feet.

Seismic Stride

Your every step has gained weight as you walk and you can sense the tremors in the surrounding ground as a feedback. Starting at 10th level, while you are raging the ground within 15 feet of you is difficult terrain for your enemies and for the duration you gain tremorsense in a 15-foot radius. 

Impactful Leap

You have become able to jump so quickly, that enemies can barely follow your movement. As you land, you can crush the ground beneath you, causing all enemies within your vicinity to be damaged by powerful ripples. Starting at 14th level, jumping out of enemies' melee range doesn't provoke opportunity attacks. The running start to make a running jump still provokes opportunity attacks. In addition, while you are raging, when you use your Ground Stomp bonus action, you can empower it to have all enemies touching ground within 15 feet take 2d6 force damage. You can empower Ground Stomp through this ability a number of times equal to your proficiency bonus and regain all expended uses, when you finish a short or long rest.