After Selene overtook the Ladder of Heavens, she made sure that all preparations were focused on defense.
At the same time, Sword Empress began negotiating with the Saint of a Devil King from Hell. The negotiations needed them to open a portal and allowing entry to the Saint and their troops to surface world. Doing so was dangerous, and it tied down Sword Empress' army as they had to make sure the Saint did not try any funny business.
While Sword Empress' army was tied down, Selene made her move. She invited all the allies Isaac had been gathering. The Sword Empress got the news but she couldn't stop the allies from reaching Selene since that would mean leaving the Saint alone.
More time passed, Isaac managed to get seeds from Hell, and the negotiations between Sword Empress and the Saint from Hell were completed.
The Saint wanted a small kingdom in surface world, and the technology they could gather from remains of Moon Dragon Kingdom.
