http://musicfamily.org/realm/Research/Earth Core（地核）
Description: This piece of rock is continuously shifting its shape, responding to mysterious energy sources.
Requirements: 2750th Excavation, R29+
Effect: Part of the Prestige research quest
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http://musicfamily.org/realm/QuestArtifacts/Secrets of the Underworld（地下世界的秘密）
Unlocks researches for Dwarven and Drow and provides a bonus for individual research branches.
Requirement: Prestige Unique Building (Dwarf or Drow), Artifact-Earth Core
Cost: 100 SXg (1E185), 10M of each faction coin（考虑使用精灵血统以加快硬币的收集效率）
Note: Secrets of the Underworld allows Prestige factions to benefit from RP production formula with no extra bonus.
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以上两步完成后完成矮人、暗精灵的特有建筑解锁即可（如在R28已完成解锁，可以忽略这部分内容；特有建筑是使用研究的前置要求）：
Dwarven Forge Quest（矮人工坊任务）
Aye again lad! Don't ye want a better place to forge yer weapons? With Enough Blacksmiths me people can help ye!
Requirement: R28, 3500 Blacksmiths（R28，至少3500个铁匠铺，建议活用妖精和哥布林血统）
Cost: 10 Sxg (1E184)
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Spider Sanctuary Quest（蜘蛛神殿任务）
Kivvil. Our Valsharess requires more places to worship the almighty Spider Queen. Build enough Dark Temples, and our priestresses will consecrate them.
Requirement: R28, 2000 Dark Temples（R28，至少2000个黑暗神殿）
Cost: 10 Sxg (1E184)
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蓝宝石从量来说已经相当够了（e112等价于R28左右）。
另外，后续你可能会考虑用上E290+DN8的组合来挖掘国王的号角。
火炏焱燚
