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History

The Heaven's Secret Valley was founded by the Mortal Monarch in order to pass down the Machine World's craftsmanship.[1] Mortal Monarch is quite renowned in the Mortal Emperor World.[2]

Geography

The Heaven's Secret Valley is situated in the Mortal Emperor World, but its exact location is unknown.

Sublocations

Techniques

The Heaven's Secret Valley's mechanical prowess could be considered the best in the Nine Worlds.[4]

Links

  • 2 Character(s) from Heaven's Secret Valley
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