2004 · ソースブック（プレイを拡張するルール／オプション）
Synergy Artifacts
This d20 supplement presents 76 artifact items for use in fantasy campaigns. The artifacts are designed for low-level characters, gaining additional power as their wielders advance in class levels. The items are organized into sets. Using multiple artifacts from the same set unlocks further powers and abilities, allowing legendary relics to develop alongside the characters who use them.
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。