2009 · ソースブック（プレイを拡張するルール／オプション）
Xax
This fourth-edition fantasy roleplaying supplement introduces a player character race born from the Elemental Chaos and the Far Realm. These small, alien creatures are benevolent philosophers who advocate tolerance and the unity of the universe, while retaining an unpredictable streak shaped by anarchy and madness. Their abilities add random effects to play, allowing them to perform surprising feats such as breathing fire or vanishing from sight.
ダイス（主にd20）レベル制（XPを獲得してレベルアップ）属性／ステータス制（STR、CON、PERなど）
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。