2023 · ソースブック（プレイを拡張するルール／オプション）
GM's Toolbox
A system-neutral resource for fantasy roleplaying game referees, compiled from decades of notes and ideas. It includes adventure seeds, rumors, magic items, trinkets, character and NPC quirks, new classes, monsters, magic swords, and altered versions of familiar 5E items. The book also contains essays on running roleplaying games and numerous tables for generating details such as spooky sounds and permanent injuries. Most material works with any fantasy system, while mechanical content includes Fifth Edition and OSR-compatible options.
属性／ステータス制（STR、CON、PERなど）レベル制（XPを獲得してレベルアップ）ダイス（主にd20）
ゲーム情報（人数、プレイ時間、対象年齢、クレジット）の出典：BoardGameGeek。