Horksbane

 is a unique steel mace found in.

Appearance
Horksbane is visually identical to a regular steel mace

Acquisition
Travel east from Skaal Village in Solstheim. There will be a small island just off the coast, aptly named Horker Island (Gyldenhul Barrow can also be found here). On the southern coast of the island, you will spot an overturned longboat with "Saden's Journal" near at hand. The journal explains a little about how the weapon's previous owner died. Now, head north along the coast until you come across several dead reavers, evidently slain by the horkers lumbering around. There will also be a unique horker named "Lord Tusk" in this area. Search Saden's body to recover the mace, and then follow the blood trail up the hill to get some nice random loot from a chest.

Enchantment
Horksbane is especially effective against horkers. This weapon may not be disenchanted, but new enchantments can be added to the weapon.

Trivia
Judging from the journal found nearby, it may be inferred that Horksbane gained its special ability due to Saden's hatred of the horkers. This could be a reference to the Baldur's Gate series of PC games, wherein several magic weapons can be found which deal extra damage to specific enemy types. As with Horksbane, these weapons usually gained their powers after their original owner suffered or witnessed atrocities committed by the creatures in question.