Amulet of Balance

It is written that this Amulet is worn by the Champion of Balance. Fact is, wearing it and then using a Serpent Gate will teleport the Avatar and the party 400 years into the past. Normally the Amulet would need a week to charge, but with the Silver Seed planted, resulting in the Tree of Balance, the Amulet can be used at any time desired to travel into the past.

Karnax gave the Amulet to the Avatar in Ultima VII Part Two, saying that they think it was his/her place to be the Champion of Balance. The Avatar mastered the challenges in the past, effectively saving the world from destruction in the War of Imbalance.

Trivia

 * A thing many do wrong: the Amulet has to be used, not the Serpent Gate.