The Phial of Undeath
It appears like the Phial of Galadriel at first - but wait! It is a cursed
phial created by an evil wizard to lure adventurers into wielding it
It can be activated for ruination every 10+d10 turns if it is being
worn. It provides light (radius 5) forever. It decreases your
strength, intelligence, wisdom, dexterity, constitution, charisma and
luck by 5. It allows you to breathe without air. It allows you to
sense the presence of undead. It is cursed. It carries an ancient
Morgothian curse. It cannot be harmed by acid, cold, lightning or
Level 20, Rarity 10, 1.0 lbs, 0 Gold

(T.o.M.E. 2.3.5)