Please answer the following question: Formulate an answer to this elaborate question: Shadow World is a high-fantasy campaign setting situated on the fictional planet of Kulthea, currently maintained by the primary author of the setting, Terry K. Amthor an American game designer, who has worked primarily on role-playing games, and as a fantasy author, and is of Eidolon Studio, born on which date?
Answer:
October 18, 1958