Two-handed Sword +1

Two Handed Swords +1 are enchanted two handed swords. When this weapon is compared to the standard two handed sword, it has +1 bonus to thaco, damage and speed factor. It is also 3 lbs lighter in weight, weighing 12 lbs. Compared to other +1 weapons, this weapon can only be gained from seven skeleton warriors, which are quite powerful and they may only be found in Durlag's Tower or in two areas which can only be accessed during the last chapter of the game, making it the last available +1 weapon of its kind. Three of these skeletons are at the first underground floor of Durlag's Tower. The other four are spread evenly in the last two available areas.

In-game description
"The two handed sword is a derivative of the long sword. Weaponsmiths have always looked for ways to improve existing weapons. In an effort to improve the long sword, the blade was lengthened. Eventually, the handle had to be extended and two hands became necessary to properly swing the sword. The primary function of two-handed swords is cleaving mounted knights and breaking up pike formations. This one has been enchanted with a few magical properties."