With the dark space trial nearing its close, the World Energy Barrier began to show slight signs of fluctuation, but these weren't noticed at all by those outside forces.
Niflheim and Asgard had a nearly endless supply of 3rd class beings that they threw into the war. But no matter how impossible it seemed for them to have such a massive reserve of troops, it wasn't strange when one considered their status.
Regardless of anything else, Niflheim and Asgard were the only influences that reigned over the unnamed world. Even organizations like Shadow Garden were only formed by those who escaped the previous two.
In this sense, it was similar to if the Celestial Star Palace controlled half the forces of the entire Cloud Plane. Even producing millions of 3rd class beings was a simple matter at this level.