7,493 backers on Kickstarter pledged $610,467 to help bring this project to life.
Onyx the Fortuitous is a popular YouTube character, perhaps best known from the video "Weird Arby's Guy." That clip featured a news story about an old woman who accidentally drove into an Arby's restaurant, and it was intercut with Onyx as a manic employee who went on bizarre rants while being interviewed.
While Andrew Bowser wanted practical creature effects from the start, he had initially thought that the Box Demon and Ghouls would be realized with makeup, and Abbadon would be performed by an actor in a suit. In the end, all the creatures were brought to life via puppetry.
Jeffrey Combs had his head shaved for the role of Bartok.