The Glens of Tirae:

The Goblins, Gitwerg, Pixies and several other races were originally from other planets within the universe in a galaxy teeming with magic and life.  Long ago the Goblins and Gitwerg were driven out to far distant lands due to their many wars, so long that most of their history before their forced exodus was lost to become only snippets in stories.  The Pixies and other species there found other species invading their galaxy and the different races united in a common goal, struggling with the high ordered beings to separate out a portion of their realm into a new pocket dimension which they shifted their entire galaxy into.  It took considerable effort, many stars and planets destroyed in the act as well as many of the magic users, but they succeeded, leaving a dark nebula behind, and their new home realm was named Tirae.  Free from the influence of invading forces, the residents of this new realm struggled to keep the peace for millenniums, but eventually many succumbed to the lure of their ancestral origin, the pull of the high chaotic beings.  Several Pixies became sprites, and other species also worked to remain pure, some leaving Tirae as a whole back to the main realm, hoping a new planet for their species alone would be peaceful enough.  Many did not survive the journey back, but enough did to populate many planets.  Others remained behind, constantly in battle with their corrupted friends and family, seeking to free them and free their realm.  Due to the high concentration of magic, many of these planets have ended up reshaped to the whims of the corrupted, most mountains leveled and deep gashes cut into the land, which over time were reclaimed by the flora and fauna, turning the majority of the land into glens and meadows.