2003 · ソースブック（プレイを拡張するルール／オプション）
The Avatar's Handbook
This d20 System supplement introduces the avatar, a divine spellcasting class that specializes in summoning celestials and can assume angelic forms at higher levels. It includes rules for adding the class to a campaign, along with 25 new celestials, seven additional creatures from the Upper Planes, five templates, two sample archangels, and 21 divine spells. The content is designed for use with other celestial and fiend-themed supplements.
スキルベース（スキルを購入または獲得）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）
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。