Age of Worms: The Return
Tilagos is an island that was created by a group of Ancient Druids. The island was to be protected from outsiders, so it was closed off on a nother plane, with the connection only through an island surrounded by constant storms. Tilagos is full of dangers, and contains a library of ancient knowledge that was lost from the world (literally taken from the pages of textbooks). When the library is accessed, the knowledge and creatures are said to reenter the world.