Rope & Spikes
Not really a conventional weapon, the rope & spikes serves a different purpose entirely. When a pit trap is inadvertently encountered, if at least one rope & spikes is carried in inventory (it doesn't need to be readied), the pit will be avoided. However, the rope & spikes are lost immediately afterward, so a large supply is a necessity for extended dungeon forays.
Although not the most powerful option, one can use it to attack enemies -- but only when outside of dungeons.
The rope & spikes is really only useful in the original Apple II version of Ultima, wherein pit traps were abundant in dungeons. In the remake, pit traps were never implemented, and the rope & spikes can't be used to attack with - thus making them effectively useless.