The Silver Seed expansion adds the Silver Seed story arc to the game, in which the party visits a subterranean keep in the ancient civilization of Serpent Isle (centuries in the past, during the war between the two sects of Ophidians). The Avatar is given an amulet by the Xenkan Monks when he or she first visits Monk Isle (either by death or by physically going there), and after using this amulet at one of the Serpent Gates, the subquest begins. Powerful magic items, including a keyring, a ring of unlimited reagents, a magic axe and an enchanted belt can be found in this area and in nearby dungeons. In later releases of the game, the expansion pack was included, and both games and expansions were released as The Complete Ultima VII.
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