I’m looking at your world map and I’m trying to figure out why the known land ends so abruptly. Most maps are of continents and the water designates the end of known land. Sometimes known land is separated from unknown lands by mountains and sometimes the unknown land is shaped roughly resembling the ideas of the cartographer (I remember looking at one of the maps drawn by ancient greeks designating the part of Europe that belongs to France and Germany and beyond as Hyperborea. However that doesn’t seem to be applicable in the case of a fantasy setting where magicians can travel on flying carpets. Even mountains might not be able to stop explorers armed with magic. So it’s either gotta be some Great Desert or some Great Ocean that’s added to the map.