Miniature Garden

Miniature Garden is a set of worlds created artificially by Hajime within the Treasure Trove. With the World Tree of this set being called the "Treasure Tree". It was initially created as a set of environments within multiple treasure troves for the divine spirit offshoots to rest in and connected to a branch of Star Tree Lutria. The Miniature Garden is the source of the Spirit Element energy that serves as Shea's trump card in battle, the Divine Armament. This set of Worlds is separate from the Root World.

Trivia

 * Miniature Garden shares the same name and overall nature, as the reality where all the events of the LN series Problem Children Are Coming From Another World, Aren't They? takes place.