Grapple

Mountains pose a problem for most travelers, being that they are normally an impassable obstacle. With the right equipment, however, they become a surmountable -- but less than simple -- challenge. With a Grapple, it is possible to climb over the mountains in question, with only the highest peaks still impassable. There is always the danger of falling if the traveler isn't a skilled enough climber, but that is the price for this highly-desirable shortcut.

The Grapple was seen (and is absolutely essential) in Ultima V. After hearing rumors in Buccaneer's Den, the Avatar asked Lord Michael of Empath Abbey for the Grapple. Only with it could the quest be completed.