Spear of Combustion

You gain +1 to attack and damage rolls made with this magic weapon.
When you throw this spear you can speak the command word to cause flames to burst forth from it. On a hit, any creature within 10 feet must make a DC 16 Dexterity saving throw, taking 3d8 fire damage on a failed save or half damage on a successful one. The spear cannot be used in this way again until the next dawn.