Tryptophan Signet

Acquisition
Skill quests:
 * Forbidden Fruit (Captain Langmar in Grothmar Wardowns)

Trivia

 * The title references the reputed soporific effect attributed to the essential amino acid of the same name commonly found in many foods. It has been widely reputed to be the cause of drowsiness after eating turkey during American Thanksgiving; that drowsiness, however, is more likely due to general over-indulgence.
 * This skill and Lightbringer Signet are the only two signets in the game that do not have flat, engraved icons similar to the front of a signet ring.