The Stone Path (Solasta)

Barbarians of the Stone Path are doggedly determined. Their Stone Resilience giving them a temporary HP buffer per turn.

Later their Strength From Within allows their thick hides to help protect them even at times they shouldn't using their Constitution to protect them from things, normally avoided, such as Dex based saves normally dodging damage, they simply shrug it off, or using their constitutional toughness, to shrug off things normally resisted by Wisdom. Basically making them too bull headed to be controlled or frightened.

Further still they become emboldened in combat, becoming Rock Solid against multiple enemies they can see.

Finally, when you reach the apex of the stone path, you achieve the Heart of Stone, Thoroughly connecting you to stone and making you nigh invulnerable while raging. 

Stone Resilience

While raging, you gain temporary HP equal to twice your proficiency bonus at the end of your turn.

 

Strength from Within

Use your Constitution modifier in place of any other ability modifier for all saving throws, provided it is greater than the modifier normally used.

Rock Solid

While raging, you gain +1 to AC per hostile opponent that you can see within 5 feet of you, up to a maximum of +4.

Heart of Stone

Having reached the apex of the stone path, your doggedness has increased, not only does the strength from within protect you from incidental dangers, the strength has deepened to you heart protecting you from all damage. While raging, you gain resistance to all damage types except Force.