Path of the Mountainous Fist

Somewhere down the your lineage of blood, there was a Earth Genasi, this has caused your affinity for the earth to have bestowed a new ability within you, despite how brutish and simple the application is, you have found a way to utilise this new power to benefit you to work in your own way.

Stone Skin

When you select this primal path at 3rd level, While raging you gain resistance to magical piercing, bludgeoning and slashing damage.

Earth-Breaker Fists

At 3rd level, your hands grow a thick stone gauntlet like carapace that covers the exterior of your fingers and hands. Your unarmed strike uses a d6 for damage. When raging, your unarmed strike uses a d10 plus rage bonus for damage.

Siege Engine

Beginning at 6th level, you've admired the structure of things like catapults and trebuchets, how they can cause mass destruction with just a stone. You gain two uses of the Catapult spell using your strength modifier (DC8 + Strength Modifier + Proficiency Bonus), Once you use this feature, you cannot do so again until you complete a short or long rest. Your unarmed strikes count as magical against resistances.
Additionally, you deal double damage to structures and objects when using Fists of the Mountain.

 

Speeding Fortress

Starting at 10th level, you've realised the potency of a punch of your caliber when you put momentum behind it. When raging, after moving 15ft. in a straight line towards a creature you may attack with advantage.
Additionally, when you are dealt damage by an attack as a reaction you may make one attack of which the creature must make a Constitution saving throw DC 8 + proficiency + Strength bonus or be stunned until the end of it's next turn. You may only use this feature once per combat.

Mountain Breaker

Beginning at 14th level, your hands have been shaped and beaten into a pair of destructive tools. Your unarmed strike uses a d10 for damage. When raging, your unarmed strike uses a 2d8 plus rage bonus for damage.
Additionally when raging stone starts to grow around your body much like how it has grown around your fists and you become the embodiment of the Mountain Breaker, gaining the following benefits:
• You are immune to forced movement.
• Critical strikes knock creatures that are large or smaller prone.
• Resistance to fire damage.
• Whilst raging you can cause the stone that has accumulated around your body to explode outwards in a twenty foot radius around you, creatures within the radius must make a Dexterity saving throw DC 8 + proficiency bonus + strength modifier or take 3d10 bludgeoning damage. You may use this an amount times equal to your proficiency modifier.