In 1891, a mine collapsed into itself. What is the dark substance found 666 feet underground? Illustrator DAN PANOSIAN provides the art for a terrifying blend of modern horror, historical fact, and western lore. Part of the Comixology Originals line of exclusive digital content only available on Comixology and Kindle. Read for free as part of your subscription to Comixology Unlimited, Kindle Unlimited or Amazon Prime. Also available for purchase via Comixology, Kindle and in print via Dark Horse Books.