Path of the Lavaborn

Upon making a deal with the gods you are shifted to the elemental plane of fire in the centre of a large lava lake causing you to panic at first however as the lava licks your skin it sticks painlessly and is in constant motion across your arms and body your head covered in flickering flames 

 

When raging your body now casts dim light at a range of 10 feet and grappling checks made against you are at disadvantage

(Any flammable items that arent part of your equipment will be set alight)

Flaming Fury

When raging your body is covered in evershifting molten rock casting dim light upto 10 feet away, melee attacks cause fire damage (1d4 at level 3, 1d6 at level 6, 1d8 at level 14, and 1d10 at level 18)

Overheat

Whilst raging you can choose to end your rage causing a fiery explosion as the molten rock reaches an extreme temperature (basically fireball centered upon yourself that you're immune to the damage from everyone else must succeed a dex saving throw)

Obsidian armour

Beginning at 10th level, your body becomes covered in hard obsidian increasing your ac by 2 and granting advantage on stealth rolls made in darkness or +2 in dimlight

One with Lava

Starting at 14th level, You gain immunity to lava damage and you can create a pool of lava on the ground that you can see within range. Until the spell ends, the magic lava fills a 5-foot cube. Any creature in the lava's space when you cast the spell must succeed on a Dexterity saving throw or take 1d12 fire damage. A creature must also make the saving throw when it moves into the lava's space for the first time on a turn or ends its turn there.

Half damage on a successful save

The Lava ignites flammable objects in its area that aren’t being worn or carried.

1/day + proficiency bonus