The Adamantite Plate Mail 'Soulkeeper' (-4 to accuracy) [40,+20]
A suit of plate armour fashioned from an unbreakable crystal by
mage-smiths.
A suit of imperishable adamant, with unconquerable strength to endure evil
and disruptive magics, that protects the life force of its wearer as
nothing else can.
It can be activated for heal 1000 hit points every 888 turns if it is
being worn. It increases your constitution by 2. It sustains your
constitution. It makes you completely fearless. It provides
resistance to life draining, acid, cold, dark, confusion, nether,
nexus and chaos. It allows you to sense the presence of undead. It
cannot be harmed by acid, cold, lightning or fire.
Level 75, Rarity 9, 42.0 lbs, 300000 Gold

(T.o.M.E. 2.3.5)