Riftwar

Midkemia is he main human-inhabited world, a medieval-fantasy realm with various kingdoms (like Pug's homeland of Crydee) and unique cultures. Kelewan is an alien world, home to the technologically advanced, samurai-like Tsurani Empire, known for its unique social structure, lack of horses, and insectoid Cho'ja. A magical rift that connects Midkemia and Kelewan, enabling the invasion and the central conflict of the first major series, The Riftwar Saga (starting with Magician).