The original homeworld of the people of Illiad, though it is technically a continent from another world called Terra Illiadis. Illiad exists within a dimensional rift, cut off from the rest of that world, similarly how much of Sancstoryl is cut off from the rest of the planet by its Storm Edges. Illiad has an extremely long and rich history, which is helped by the fact that Illiad is incredibly ancient by Sancstorylian standard, as Sancstoryl is, compared to Illiad, a much younger world.
There are only a few nations on Illiad, mostly occupied by Illiadian races. However, plenty of people from other worlds, most notably worlds that are in alliances with the Illiadian governments, also make their home here. The countries are the United Territories of Illiad, The Isle Republic of Aisepa, the Orasara Alliance and the Autonomous Island of Eikarada.
After The Great Wasting, any and all contact to it as been lost to the people of Sancstoryl, cutting off the Illiadian peoples on Sancstoryl from their original homeworld.