Supermassive Gravity Source—an immensely powerful source of gravity spanning millions of light-years and rotating at near-light speed. By all previous standards, its scale was enough to qualify it as one of the Outer Domain's wonders.
Because of its intense gravity and rotation, this enormous gravitational vortex created a gravitational anomaly at the center of the entire supercluster, one that could be called a Supermassive Gravity Source.
Its immense gravity forced galaxies hundreds of millions of light-years away to fall under its influence, compelling them to move toward its gravitational center.
Thus, it affected nearly every galaxy in the surrounding local galactic groups and other superclusters. Local lifeforms were deeply puzzled by the abnormal gravitational constant here, and every civilization attempted to understand what sort of existence it was.
They had no choice but to regard it as a natural phenomenon. Some even revised their own theories so that their gravitational parameters could fit the disturbances caused by that vortex.
In truth, that was completely wrong. They had been utterly misled by this spectacle. If they built flying vessels according to the parameters suggested by the wonder and attempted to cross the universe, they would certainly lose their way and end up who knew where.
Thus, some civilizations that had already mastered the ability to traverse the universe—Sixth-Rank and Fifth-Rank civilizations, for instance—had once believed that this artificially created Supermassive Gravity Source ring was a terrifying weapon of destruction. They had guarded against it with all their strength, and some had even relocated their entire races.
But none of that mattered to the Micro-Birds. They could not even "see" those lifeforms. To them, they had merely created a comfortable, warm nest.
This nest was filled with houses built from gravity, entertainment facilities built from gravity, artistic landscapes built from gravity, and