Witchwither

 is a disease that causes immediate paralysis, lasting indefinitely unless cured.

The Paralyzed Barbarian
After angering a Witch, Hisin Deep-Raed was cursed with this disease and left to die in the West Gash wilderness. When the Nerevarine encounters him near Ald'ruhn and cures him, Hisin offers his unique helmet, The Icecap, as a reward.

Trivia

 * Hisin's is the only person in who has this disease, and the Witch who reportedly inflicted him with it does not actually exist in-game.


 * Witchwither can be added via the console (Player -> AddSpell "witchwither"). The Nerevarine is paralyzed, but can use a Potion of Cure Common Disease to remove it.