The Frozen Halls — Hollow Adventures is a system-neutral, interactive, dark low-fantasy adventure supplement with an artistic and thematic old-school feel that you can adjust to any tabletop roleplaying game system. It contains: One regional map — Voreia. A town map — Ersheath. The following five dungeon maps: The Worm, Everflame, The Impossible, Under Ice, and Dark Blue. Characters. Magic items. To construct your adventure, you use the mini icons index, tables, maps, NPCs, and items.