2023 · ソースブック（プレイを拡張するルール／オプション）
Yggdrasilar
A short Pathfinder First Edition supplement introducing the Yggdrasilar, mythic plant guardians that patrol the branches of Yggdrasil and prevent intruders from crossing into other planes. The volume includes the creature’s statistics and abilities, natural items that can serve as spell components, and additional plant- and nature-themed material such as equipment, hazards, ailments, feats, and spells. The creatures use rules and powers from Pathfinder Roleplaying Game: Mythic Adventures.
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。