The Augmented Chain Mail of Caspanion [11,+10]
+3 to intelligence, wisdom and constitution. It increases resistances:
+30% acid and +30% poison. It provides protection from the effects of
confusion. It is vulnerable to damage by disenchantment. When worn and
activated, it destroys all doors and traps next to you, recharging every 10
Level 25, Rarity 9, 27.0 lbs, 20000 Gold.

(EyAngband 0.5.2)