I'm looking for a map (it was included in the pirated edition of In the Wake of Gods by Fargus).

The XL map stood out because it had an island in the center where you could recruit all types of dragons, and underground there were areas with artifacts and treasures guarded by legions of creatures of the same type (there were 4,000 of them).
In the upper left corner, there was grass and human castles, and along the bottom, there was snow and elemental castles. Underground, there were swamp castles.