Oh right, sorry.
There are three worlds, connected with each other via ancient gateways left over by a race known as Firstborn. That race lived in all the three worlds and the fourh world which was destroyed by the Outer Gods from the Astral Plane. There is also Spirit Plane and Dream Realm.
Elysea is one of three worlds. It is a lush and beautiful world, full of trees. It is also very mountainy, the land consicts out of great mountains and stone spires. The trees are either green or violet. Local race - none
Karhdum is another world. It is a desert, that was once a grassland world. One of the greatest ruins sof the Firstboen stand in this world. Dried out of oceans and lands are almost lifeless, yet life manages to survive in the open caverns, where there is plenty of shadow and water. Local race - Kaghar