Flame tongue

Weapon (any sword) Rare (7.500 gp)

You can use a bonus action to speak this magic sword’s command word, causing flames to erupt from the blade. The flames shed bright light in a 2 sqr. (3m) radius and dim light for an additional 2 sqr. (3m). While the sword is ablaze, it deals an extra 2d6 fire damage to any target it hits.