The Katana 'Kusanagi-no-tsurugi' (4d4) (+15,+15)
+3 to DEX, Stealth
Slay Animal, Evil, Demon, Dragon
Resist Acid, Lightning, Fire, Cold, Fear, Nether, Disenchantment
See Invisible; Regeneration; Blessed Blade; Permanent Light(1)
Activates for a getaway every 35 turns
Level 50, Rarity 20, 12.0 lbs, 123456 Gold

(Hengband 1.6.0)