The Iron Helm 'Terror Mask' (+18,+18) [5,+10]
-1 to INT, WIS, Searching
Resist Acid, Cold, Poison, Fear, Disenchantment
Free Action; Anti-Magic; See Invisible
Activates for rays of fear in every direction every 3*(level+10) turns
Level 50, Rarity 3, 7.5 lbs, 200000 Gold

(Hengband 1.6.0)