Touch of Green-Fire

You cause your fists to erupt in green flames, or any weapon not made of wood that you touch. Any damage dealt will have an extra 1d4 of fire damage. If you ignite your fists, you gain proficiency on an unarmed attack. If you end your turn grappling another creature with your hands, it takes 1d4 fire damage. 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 a bonus action if you cast it again or after dealing damage.

If you ignite your fists, for the duration, any flammable object you attempt to hold catches fire. The green fire does not burn plants or wood.