Undeadhunter

Legends say that a long time ago, a lich lord experimented with creating sentient servants instead of mindless automatons. To ensure their loyalty, he made a number of weapons imbued with magic that could counteract the magic holding undead together, inflicting great damage. Although the lich met his end long ago, his weapons, spreading disruption among the undead, are said to have been popular. At least, old tales are full of them. However, this mace might be the only one to last - perhaps due to efforts of the agents of the Shining One, who say that one should not fight necromancy with necromancy.

A great steel mace

+7, +7 great mace

Disrupt undead (special brand)
rN+

Deals special damage to undead but no extra to demonic monsters.

Desirability

If you find it and are already using two-handed maces, it's a good switch for places such as Tomb or Crypt. A mundane weapon is likely to be better for general use, though.