The Two-Handed Sword 'Dragonic Sword' (4d6) (+17,+23)
+3 to STR
Slay Evil, Demon
Lightning Brand
Resist Lightning, Fire, Nether
See Invisible; Permanent Light(1)
Activates for large lightning ball (500) every 425+d425 turns
Level 50, Rarity 160, 20.0 lbs, 180000 Gold

(Hengband 1.6.0)