Searing Smite

Casting Time: 1 bonus action
Range: Self
Duration: Concentration, up to 1 minute
The next time you hit a creature with a melee
weapon attack during the spell's duration, your
weapon flares with white-hot intensity, and the
attack deals an extra 1d6 fire damage to the target
and causes the target to ignite in flames.
See PHB, pg. 274.