Path of the Stonesinger

Many in Goliath culture choose to forsake the intricate stone art of their kin and instead take up arms. These individuals focus the traditional rage of the barbarians into a single focus and unleash this in the form of chants. These Stonesingers use their unique magic to bolster their connection to the Earth to devastating affect. Goliath, Mountain Dwarf, Firbolg and Ogre barbarians are capable of walking this path.

Hymn of Roiling Ground

Starting at 3rd level, when you rage you cause the ground around you to fracture. The terrain within 10 feet of you becomes difficult terrain and one creature of your choice within this range must succeed on a Dexterity saving throw or fall prone, you can repeat this save as a bonus action until your rage ends.

You are unaffected by difficult terrain caused by this effect and the range of the effect increases to 15 feet at 6th level, a number of creatures up to your proficiency bonus are also unaffected by the difficult terrain caused by this effect at 10th level,  the range is increased to 30 feet at 14th level.

The DC equals 8 + your proficiency bonus + your Constitution modifier.

Hymn of the Unbreakable Boulder

Your chant strengthens your connection with the Earth, forming a bond inseparable, so much that the ground beneath you is an extension of your form. During your rage, you cannot be moved or made prone against your will. You are able to form protective stone armour that grants you 1d10 + your constitution modifier temporary hit points once per short rest.

Hymn of the Mountain Splitter

At 10th level, as your chant lengthens so does your power over stone. Not only are you able to command stone to damage enemies on your first attack in a round but you may also use Stone Shape up to your proficiency bonus per long rest.

Hymn of the World Shaper

At 14th level, You have achieved near perfect unity with the World itself and your skin starts resembling that of stone, granting a +2 AC. Your Hymn shakes the very foundations of the planet and you are able to raise stone walls as described in Wall of Stone, once per long rest.