Vysianter's Guide to the Red Wastes of Avernus

From publisher blurb: VYSIANTER'S GUIDE TO THE RED WASTES OF AVERNUS is a wilderness+dungeon location supplement for Tier 2 gaming groups exploring the First Layer of Hell. Discover the great desert known as the Red Wastes with nine thrilling locations and five random encounters, as well as the Lost Temple of Dak-Thrael, a ruined sanctuary for the mad archdevil Veceranna, worshipped as "The Queen of Lilies". Both locations are described in detail with new creatures, lore, and magic items.