Does anybody got an idea where you can find the stormfang steel sword in skyrim: dragonborn?
A Reaver Lord at Brodir Grove is wielding it. Simply kill the Reaver Lord (or pickpocket him with the proper perk) in order to obtain the weapon.
Stormfang actually respawns with the enemy after a couple of days. This makes it possible for you to get several instances of it, or to get a new one if you lose it.