Burning aura

For a duration of 3 rounds, you have an aura of fire around you. Any opponent that makes a melee attack roll against you, success or fail, takes 1d4+1 fire damage. You may, as a bonus action, choose to end the spell. When you do, the aura turns into a ball of fire. Make a ranged spell attack with range 50 ft. On a hit, the ball deals 1d4+1 fire damage.

At higher levels: When you use this spell with a higher level spell slot than second, for every 2 levels above second level, add 1d4 rounds to the duration.