Project Starfall was a project undertaken by Trottenheimer, the original inventor of the Megaspell. Project Starfall's goal was creating a mostly non-magical means of mass destruction. Trottenheimer experimented extensively with Star Metal found beneath Hoofington and used it in the project.
A Star Blaster was also involved in the project, owned and monitored by the Ministry of Awesome. The result of Project Starfall was the creation of Trottenheimer's Folly and its unique "Silver Bullet" ammunition.
The ammunition for Folly is extremely rare, and each round discovered (with the exception of a dissected round encountered alongside the Wall choir) has been in a special case that will open only to members of a few specific genetic lines.