Blaze

A flickering flame appears on a part of your body. The flame remains there for the duration and harms neither you nor your equipment but can be shifted to different parts of the body. The flame sheds bright light in a 10-foot radius and dim light for an additional 10 feet. The spell ends if you dismiss it as an action or if you cast it again.

For the duration, you can use your spellcasting ability instead of Strength for the attack and damage rolls of unarmed strikes, which deal an additional 1d4 Fire damage on a hit. Your unarmed strikes also become magical, if they aren't already.