Wishbringer

Wishbringer: The Magick Stone of Dreams is an interactive fiction computer game written by Brian Moriarty and published by Infocom in 1985. It was intended to be an easier game to solve than the typical Infocom release and provide a good introduction to interactive fiction for inexperienced players, and was very well received.

You are a postal clerk in the small fishing village of Festeron. The cranky postmaster, Mr. Crisp, orders you to deliver an important envelope to the proprietor of Ye Olde Magick Shoppe. The proprietor in question, a kindly old lady, then asks the player to rescue her cat from a mysterious sorceress known only as The Evil One.