In the age of the Gates all kinds of creatures come to the Grey Dragon World.
Some come to coalesce, since the healing breath of the Grey Dragon keeps almost any ailment at bay. Some come to seek new fortunes. There are those who come involuntarily and finally there are those who are invading.
The Grey Dragon limits the number of the gates to one per land mass (continent or island) and to no less than 3 in total. One in the underworld, one in the Norther hemisphere and one in the Southern hemisphere. The first three where in Naddoo, one in Lakoria and in the center of the Deep mines.