Ok, heres my world... feel free to give suggestions and the like.
Kcrahathea (pronounced with a silent h) is a land seperated into two empires by a a river of pure magical energy known as the Kranes. On each side of this mystical river lies a nation, the eastern one called Markee, and the western one being Adikron. There are many races, peoples and creeds in Adikron, although three are most mention-worthy. The Humans, the people who came to Kcrahathea thousands of years ago from the planes, the Dudokai, the giant-like, six eyed rulers of Adikron, and the Srepterai, sleek, small framed serpentine warrios and assassions who occupy both nations. The enemies of Kcrahathea are many, but they all have one thing in common, they have all breached the surface of Kcrahathea once or twice to raid, steal and plunder.
Geography/Cosmology of Kcrahathea
Kcrahathea is a world nearly the size of earth, but to sentient creatures, it is much, much larger, since there are no oceans in Kcrahathea, just huge lakes. There are about seven of these huge lakes in all, one of them being in Markee and called Tharss Lake, two being in Adikron; the Charshot and Brendien Lakes. These are about the size of all the Great Lakes put together. Adikron and Markee obviously don't even take up a fourth of this area, and so most of it it is... well, unknown to Markee and Adikron. The River Kranes, the magical river, seperates the planet totally. The river runs through the exact middle of the planet. The Planes, as they are called, are dimension type worlds that are located on different planes of the universe. No one really knows about them on Kcrahathea, and those who do don't know much.
The Enemies of Kcrahathea
Kcrahathea has many 'enemies', people who wish to take the civilized lands of Adikron and Markee for themselves, or simply want to take some of the nations, I.E. raiding them and stealing people as slaves, and items, and even the unique resources of Kcrahathea. The general populace of both Kcrahathean nations know nothing of the 'planes' or dimensions that lay beyond the metaphysical borders of the world, but the educated Kranes Boundsman and Dudokai of Markee and Adikron do; though they do not know that much, and so when boatloads of strange people come from the clouds and wreak havoc, they don't really know whats going on. Evevytime this does happen, though, the armies of the nations advance, and usually crush the enemies, who just come back later, weeks, months or years. The raiders come from everywhere, and no town or city is safe when they do, unless they are heavily protected with troops.
The Magic of Kcrahathea
There is one universal source of power, magic power, in Kcrahathea, and that is the River Kranes, a river that seperates the two nations, and is made up of pure, bluish gray magical energy. When one enters the river, he is never found again. Most believe that the River is deep enough to reach the other side of the world, and thus, the Kranes river on both sides. The Spellcasters of Kcrathea draw their magical power from the river itself, as do many magical creatures, and creatures who stay near the river too long become magically mutated. Kranes Boundsman are the most common types of spellcasters in Kcrathea, although others do exist (divine magic doesn't really exist in Kcrathea, however). Kranes Boundsman bound their magic soul to the river Kranes itself (not really their real soul), and therefore recieve large ammounts of magic. The Kranes Boundsman are the single most powerful sect of magic users that currently exist in the civilization of Kcrahathea. But other, more powerful magics exist outside of civilization, amongst the 'savage races' of the wilderness, including the Brastadie and the more powerful Munaquai tribes.