Path of the Caldera

Molten Rage Quirks
d6	Quirk
1	Your skin bubbles and pops
2	Glowing cracks radiate up and down your body
3	Blood spilled by you hisses, painfully hot
4	Your hair billows like flickering flames
5	Smoke pours from your mouth and eyes
6	The air around you shimmers like a mirage

Ashbringer

At 3rd level, when you adopt this path, you become acclimated to hot climates, as described in chapter 5 of the Dungeon Master's Guide. Additionally, you can breathe normally in a smoke-filled or similar environment.

Call the Caldera

Beginning when you choose this path at 3rd level, when you enter your rage you can erupt, transforming the area within up to 5 feet of you into a volcanic landscape until your rage ends.   This area is difficult terrain for creatures other than you, lightly obscured, and when a creature other than you starts it turn within it or enters it for the first time on a turn, it takes an amount of fire damage equal to your Constitution modifier.   The area your eruption transforms grows larger as you reach higher levels in this class, increasing to 10 feet at 10th level, and 15 feet at 14th. Additionally, while you're raging, you have resistance to fire damage.

Pyroclast

At 6th level, you can use the unstable nature of your power to become airborne momentarily. While you're within the area created by your Call the Caldera feature, you can use your bonus action to leap to a space you can see within 30 feet of you.

Magma Chamber

At 10th level, you can cast the meld into stone spell, but only as a ritual. When you do so, the surface of the object bubbles with a simmering outline of your form, and you can speak and hear normally.

Eruption

Starting at 14th level, as an action on your turn you can cause the area created by your Call the Caldera feature to explode as a 15-foot radius, 120 foot high cylinder of molten material centered on itself. Each creature other than you within that area must make a Dexterity saving throw. A target takes fire damage equal to twice your Barbarian level on a failed save, or half as much damage on a successful one. You can use this ability only once per rage, and until the end of your next turn, your rage can't end early as a result of not attacking a creature.