Tarmet's Flametongue

You touch a nonmagical, melee weapon held by a willing creature. Until the spell ends, the creature may speak a command word to cause the weapon to ignite for one minute. While ignited, the weapon deals an additional 1d6 fire damage on a hit and sheds bright light in a 10-foot radius and dim light for an additional 10 feet. The spell ends early when the ignition ends or the command word is spoken again. A creature that cannot speak a language cannot ignite the weapon.