Path of Blackest Earth

Starting when you choose this path at 3rd level, your body undergoes magical changes, you become rock-like and durable, and your weight doubles.

Your Unarmored Defense feature is altered: while you are not wearing any armor, your armor class equals 15 + your Constitution modifier.

Additionally, you gain resistance to bludgeoning all the time instead of only while raging, you are immune to the petrified condition, and you have advantage on Stealth checks made to hide in rocky terrain but use Constitution instead of Dexterity for such Stealth checks.

Finally, your walking speed is reduced by 10 feet but you are not affected by difficult terrain caused by rubble, rough or muddy earth, mountainous terrain, or other similar situations.

Beginning at 6th level, while raging you are immune to bludgeoning and to being blinded, deafened, frightened, or stunned. Additionally, your unarmed attacks deal bludgeoning damage equal to 1d12 + your Strength modifier, and count as magical for the purpose of overcoming resistance and immunity to nonmagical attacks and damage.

Starting at 10th level, when you use your Brutal Critical feature against a creature that is no more than one size category larger than you, you can choose to push that creature 10 feet away from you in a straight line. If you do, that creature must make a Dexterity (Acrobatics) check against DC 10 + your proficiency bonus or fall prone at the end of this involuntary movement. Additionally, your attacks against an air elemental of any kind score a critical hit on a roll of 18-20.

Starting at 14th level, as an action you can stomp your foot on the ground to cause an effect identical to the Earth Tremor spell as if cast with a 5th-level spell slot, using Charisma as your casting ability. If this causes an area to become difficult terrain, you may move through that area as if it were not difficult terrain due to your Terrestrial Blessing feature. You can use this feature a number of times equal to your proficiency bonus per long rest.

Starting at 20th level, you are always immune to bludgeoning damage, instead of only when you rage. However, you are considered to be an elemental creature in addition to your own normal creature type, and can be targeted by spells and abilities that affect elemental earth creatures. Your native plane remains the plane you were born on.

Some who follow this path become similar to a xorn. When you gain your 10th level in this class you can choose to gain the Xorn Affinity feature described below instead of the Impactful Critical feature. If you do so, when you gain your 14th level in this class you gain the Earth Meld feature described below instead of the Seismic Stomp feature.

Starting at 10th level, you gain tremorsense out to a range of 60 feet. Additionally, you can pinpoint by scent the location of precious metals and gemstones within 60 feet.

As an action with a range of touch you can absorb an unattended non-magical chunk or pile of precious metals or rare stone with a total weight of up to 10 lbs, or a non-magical gemstone of any weight, to regain a number of hit points equal to the gold coin cost of the absorbed object divided by 100 (rounded up). Objects consumed in this way are destroyed. You may use this feature a number of times equal to your proficiency bonus per long rest.

Starting at 14th level, you can move through nonmagical, unworked earth and stone at your walking speed. While doing so, you do not disturb the material you are moving through, and you may stop moving and stand in place without harm. Your biological processes are suspended while doing this; you don't need to eat, drink, or breathe.

You may use this feature a number of times equal to your proficiency bonus per long rest and each usage lasts for a number of minutes equal to your barbarian level. If you remain in earth or stone when a usage would end, you may immediately activate another use of this feature if able, otherwise you involuntarily hibernate for 8 hours and take a long rest. At the end of your long rest you may immediately activate this feature, or choose to remain in hibernation and take another long rest, repeating this process indefinitely.