Volendrung is a unique Dwarven Warhammer in The Elder Scrolls II: Daggerfall.
The Hammer of Might, Volendrung is said to have been created by the Dwarves of the now abandoned clan of Rourken, hundreds of years before they disappeared from the world of Tamriel. It has the ability to grant health to its wielder, but it is best known for the paralyzing and strength-leeching effects it has when cast at an enemy. Like the Dwarves who created it, Volendrung is prone to disappearing suddenly, resurfacing sometimes in days, sometimes in eons.
This weapon uses the following:
Volendrung can be obtained by summoning Malacath on the 8th of Frostfall. He will give you the name of a radiant dungeon to kill a Daedra Seducer. After doing that, go to the name of the radiant town and meet his worshiper to collect your reward.
Upon completion of the quest, Malacath will reward this item.