It's 1891 and a mine collapses into itself. Find out what the dark substance found 666 feet underground is in this horror Western! <br> <br>SCOTT SNYDER pens this Lovecraftian take on the Wild West with stunning scenery captured by veteran illustrator DAN PANOSIAN! <br> <br>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 collected in print via Dark Horse Books.