branding blade

As part of the action used to cast this spell, you must make a melee attack with a weapon against one creature within the spell’s range, otherwise the spell fails. On a hit, the target suffers the attack’s normal effects, and it become branded dealing an extra 1d4 fire damage to the target.. Branded enemies take disadvantage in stealth rolls against the caster.

You cannot brand more than 1 enemy at the same time.

The spell's damage increases when you reach higher levels. At 5th level, the extra damage increase in a 1d4 fire damage , and then increases by another 1d4 at 11th level and 17th level.