The Corrupted Huanglong cannot move its body as its physical form is sealed by the Seal of Four Directions. What it can do is invade the minds of beings in the eastern continent. The only problem for it is that the minds that it could invade are also limited in capacity as one would need the blood of the old emperor or its own blood in them.
The Corrupted Huanglong or rather the Huanglong did not have any descendants, but it did share some of its blood to the people of the eastern continent. This is how the Huanglong created champions that have a small fraction of its power. Still, the conversion happened thousands of years ago which meant that the blood that was given to the last champion might have diluted. Another possibility is that there are no descendants of the champions the Huanglong has raised.
