Negary had never done anything without preparations, so he had a contingency plan prepared for any unexpected situations.
After he completely conquered the SCR world, he had begun his work on modifying it.
It wasn't just the modification of turning it into a system of parallel worlds, but also the modification of its mobility.
The Moon Tree world wasn't originally an elven world, its original unique characteristic was its mobility, being capable of moving through space. It was because the will of the Moon Tree wanted this characteristic that it gradually shaped that world into the current Moon Tree world.
When Negary infected the outermost layer of the Moon Tree world, he obtained a large amount of data, which included the knowledge of how a world would move.