The Adamantite Plate Mail 'Soulkeeper' (-4) [40,+20]
+2 constitution. Provides resistance to acid, cold, fear, dark, confusion, nexus, nether, chaos. Cannot be harmed by acid, electricity, fire, cold. Sustains constitution. Sustains your life force.
When activated, it heals 1000 hit points. Takes 444 turns to recharge.
Min Level 75, Max Level 127, Generation chance 11, 42.0 lbs

(Angband 3.1.2v2)