A Record of a Mortal is Journey to Immortality Wiki

True Dragon Island was very strange in that it existed in a unique space that was situated in several realms at once.

There was a giant green moon up above that concealed virtually the entire sky. Actually, it was more accurate to refer to this as a gargantuan semi-spherical island that was entirely enshrouded under a green light barrier, and there were some buildings that were visible on the island.[1]

There were all types of living beings on the island, most of which were wyrms, but there were also over 10 true spirits on the island, most of which were true dragons, which was why it was known as True Dragon Island.

  1. Chapter 2442 (Novel)