2012 · 资料书（用于增强玩法的规则/选项）
Helm of the Hydra
This supplement presents the Helm of the Hydra, a legendary psionic item that grows in power as its wielder unlocks new abilities. It grants the wearer ways to coordinate with allies and combine forms. The book includes the item's history, attunement requirements, abilities, and rules for using legendary items.
技能型（购买或获得技能）基于属性/数值（STR、CON、PER 等）等级制（获得经验值并升级）
免费，支持网页、Android 和 iOS
用 Ludoya 玩 Helm of the Hydra
游戏信息（人数、游戏时长、年龄、制作人员）来自 BoardGameGeek。