the Writhing Sword

Object 'sword writhing ' is type weapon, material Iron.
Extra flags: dark invis magic antigood noremove.
Weight is 28, value is 2, level is 55.
Weapon type is sword.
Damage is 11d4 (average 27).
Affects poison by 3.
Affects hitroll by 5.
Affects damroll by 4.
Unique item.