Hiroshi Labyrinth Stronghold

Vaule for Realm Crystal is a secret vaule where the Realm Crystal is hidden. It was created by Borg industries and builded by security droids. It's located in Hiroshi's Labyrinth.

Public Enemy Number One
Nadakhan found the vaule due Misako's hint and get Realm Crystal there. He defeated Borg's droids and traps thanks his abilities.

The Way Back
Jay's last wish caused the events of Skybound to never happen, thereby keeping the Realm Crystal intact.