Path of the Mountain

Barbarians who walk the Path of the Mountain are often massive in stature, even for Barbarians, and can utilize their ox-like to control their position on the battlefield and keep the blows of their enemies away from their weaker allies. 

Lockdown

Starting when you choose this path at 3rd level, you have mastered the ability to hold a creature in place with your weapon. Once per turn, when you hit a creature with a melee weapon attack, you may choose to reduce its speed to 0 until the start of its next turn. You can use this feature a number of times equal to your Strength modifier (minimum of 1) and you regain all expenses uses when you finish a short or long rest.

Resolve of the Mountain

Starting at 6th level your mass and willpower cause you to be nearly immovable against your will. You can never be forced to move or knocked prone by any nonmagical means.

Hardened Skin

Starting at 10th level you become more resolute when you stay in one area. At the end of each of your turns while raging, you gain +2 temporary Hit Points for each 10ft. of your movement you did not use on that turn. This effect stacks each turn and you lose all temporary Hit Points you gained from this feature when your rage ends.

Statuesque Resistance

Starting at 14th level you have become so used to covering one area of the battlefield that you can defend your position almost untouchably. While raging, you may use your bonus action to gain +5 to your Armor Class until the next time you move at least 5 feet. You can use this feature a number of times equal to your Constitution modifier (minimum of 1) and you regain all expended uses when you finish a short or long rest.