2018 · 资料书（用于增强玩法的规则/选项）
Opus of Elemental Substance
A collection of 1st- through 9th-level spells focused on six elemental forces: acid, cold, fire, lightning, thunder, and earth. The spells allow warlocks, wizards, sorcerers, and other spellcasters to wield these elements as weapons, defenses, and tools, freezing creatures, calling down destructive storms, turning foes to ash, and reshaping the world around them.
基于属性/数值（STR、CON、PER 等）等级制（获得经验值并升级）骰子（主要为 d20）
免费，支持网页、Android 和 iOS
用 Ludoya 玩 Opus of Elemental Substance
游戏信息（人数、游戏时长、年龄、制作人员）来自 BoardGameGeek。