Essence of Flame

Your blood is flammable when fresh. Any entity which moves through or occupies the same space as the fire, or is covered in blood takes 1d8  fire damage per turn. As a bonus action you can cut yourself for 1d8 slashing damage to cover a weapon or object in blood, adding 1d8 fire damage to any successful attack and setting the object ablaze. Non-magical objects are damaged by this process depending on the duration of their exposure.

Any flaming character rolls disadvantage on stealth checks related to sight

This spell's damage increases by 1d8 when you reach 5th level (2d8), 11th level (3d8), and 17th level (4d8)