Kain retrieved the space ring from the Doctor's hand after Elemental Guardian, now in its fire-attribute form, melted the ice surrounding his body. Kain's fingers curled around the small object that, according to the extracted memories, contained the man's twisted research notes.
The guards who were previously knocked unconscious all had a split of Bea in their minds in order to extract their memories, since they were no longer able to resist and had no further value, Kain ordered Bea to simply eliminate all of them by wiping their consciousnesses.
While the Queen and her guards focused on guarding and healing the children, Kain and Serena swept the rest of the building.
In one of the larger rooms, they stumbled upon a treasure trove of research notes and books about the cultivation methods of other nations as well as less sensitive research results compared to what was in the space ring that Kain obtained.