Sceptre of Lord British

The Sceptre of Lord British, one of the three Royal Crown Jewels, is a very powerful magical artifact. This powerful tool dispels any kind of magical force field, even the walls of the Shadowlords in dungeon Doom.

The Scepter was saved from Lord Blackthorn by Chuckles, who gave it to a trusted knight to bring it to safety. Sadly, while in Trinsic, a Shadowlord stole the sceptre. The Shadowlords, fearing its power, stored it in their keep Stonegate. It was there, where the Avatar found it, guarded by deadly traps, the daemon Balinor, and even the Shadowlords themselves. Only with the sceptre was it was possible to traverse Doom. It was not seen again in later games, but likely remained with Lord British.

Trivia

 * If a Shadowlord attacks the party while in possession of the sceptre, the Shadowlord steals it.
 * It acts like the dispel field spell, but does not require mana.
 * It's impossible to retrieve the sceptre from Stonegate without the magic carpet due to deadly pitfalls.

Ultima V: Lazarus
In Ultima V: Lazarus the sceptre serves a similar purpose, although it can be retrieved from Stonegate without the help of the magical carpet.