The Runed War Sword 'Mormegil' (-12, 8d9)
-5 to speed. It increases resistances: +60% nether. It modifies damage:
x2 vs. undead, x2 vs. demons and x3.5 vs. dragons. It provides protection
from the effects of experience drain. It gives its wielder see invisible.
it burdens its wielder with aggravation, experience drain and a taint. It
is heavily cursed. It is vulnerable to damage by disenchantment.
Level 30, Rarity 15, 22.0 lbs, 5000 Gold.

(EyAngband 0.5.2)