2006 · ソースブック（プレイを拡張するルール／オプション）
Fiendish Aspects I
This web enhancement provides four aspects of demon lords for use as mid-level foes in fantasy roleplaying campaigns: Juiblex, Zuggtmoy, Kostchtchie, and Demogorgon. Each aspect represents a particular facet of its demon lord rather than a reduced version of the complete entity, with abilities tailored to themes such as wrath, oozes, combat, and demonic powers. The guide includes suggestions for adapting each aspect to campaign settings, along with options for creating alternate versions by changing their abilities and focus.
属性／ステータス制（STR、CON、PERなど）クラス制（パイロット、ウィザード、サイエンティストなど）スキルベース（スキルを購入または獲得）
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。