Primordial Rage

You gain the following effects: 

• When you damage a creature that is concentrating on a spell, that creature has Disadvantage on the saving throw it makes to maintain its concentration.

• As a bonus action, you can unleash the primal rage from within you, causing magical flames to ignite on you. These flames shed bright light in a 30-foot radius and dim light for an additional 30 feet. When you hit with an attack while enraged, the target takes extra Fire damage equal to half your character level (rounded down) plus your Proficiency Bonus. In addition, while you are enraged, you have an immunity to Cold and Fire damage. If you are able to cast spells, you can't concentrate on them while enraged. This enraged state lasts for 1 minute. It ends early if you are knocked unconscious or if you use your bonus action to end your rage.

  You can use this feature a number of times per Long Rest equal on your Proficiency Bonus.