D&D 5th: Demon Tower of Madness
+1 Sword: Flametongue
This blade is etched with flame designs that sometimes flare as if they were real fire. It is warm to the touch. In combat, the blade roars to life. It burns like a red dragon’s tongue might, flaming scarlet and orange, and the weapon’s tip exhales a thick spiral of black smoke.
Property: As an action, you can speak the sword’s command word to cause flames to erupt from the blade. The flames emit bright light in a 20-foot radius and dim light for 20 feet beyond that. The flames last until you speak the command word again or until you drop or stow the item. Your attacks made using the weapon while it’s flaming deal 2d6 extra fire damage.