Halls of Undermountain 1: Zarr's Invincible Army

A noblewoman asks a group of adventurers to find her nephew, who has ventured into the dreaded Undermountain. The adventure begins in Waterdeep and leads into the dungeon as the party works to rescue him and make the entrance safe. Designed for characters of levels 1–5, the adventure uses published stat blocks written for a first-level party and provides around 16 hours of play, or four sessions.

属性／ステータス制（STR、CON、PERなど）ダイス（主にd20）レベル制（XPを獲得してレベルアップ）