Sunbearer

Embrace the power of fire and the sun.

Level 3: Embody Sun

When you hit a creature with a weapon you can use the mastery property of, you can change the damage type from what it originally was to fire damage. 

Level 7: Third Wind

You gain another use of second wind. 

Level 10: Fire Surge

Whenever you use your action surge ability, you can choose cast the thunderwave spell but the damage type is changes to fire damage. Dexterity is your spellcasting ability for this feature and you do not need a spellcasting focus for this feature.

Level 15: Additional Fighting Style

You gain an additional fighting style feat of your choice.

Level 18: Divinity

You know the divine smite spell. Dexterity is your spellcasting ability for this feature. You may cast it twice per long rest.