Serpentwyne

Serpentwyne is an extract from Silver Serpent Venom, that holds none of the latter destructive properties.

Description
The result of long years of experimentation and research by people like Kessler, Serpentwyne is extracted from the dangerous Silver Serpent Venom. However, this process removes all of the ill effects normally associated with the venom, such that drinking it can instead restore a person to full health. The secret of producing the Serpentwyne, together with one of the last existing Silver Serpents, was entrusted to the Brotherhood of the Rose, so that they would be able to produce it for anyone in need of its healing properties. It appears in Ultima IX.

Prior the events of Ultima IX, the serpent was kidnapped and the Serpentwyne storage of the Cathedral of Love plundered by Aria and her helpers. Thus, no more Serpentwyne could be produced, even after the serpent was returned, since the production of the venom takes considerable time. The Serpentwyne bottles were scattered throughout Britannia and were difficult to recover.

Trivia

 * There are exactly 36 bottles to be found in Ultima IX. Notably, these bottles are all found on the overworld and not in dungeons. A big number of them can be found on beaches, implying that the thieves lost many bottles when they fell from their ship into the ocean.
 * Using the Ritual of Restoration at a repaired shrine has the same effect, but for free. Same goes for just sleeping a few hours in a bed.