Asheron continued to research planar magic. Eventually, the Yalaini mastered this art of magic and were able to use it to create portals from one location to another. They used these portals to explore all of Auberean, and eventually began exploring other worlds, including the home world of humans known as Ispar. In their explorations, the Yalaini came to a world dominated by numerous giant insect species. One of these species were known as the Olthoi, which killed one of the explorers. The Emperor of the Yalaini demanded that Olthoi be brought back for research and possibly used as weapons for the empire. This action, along with the mistake of a wizard named Gaerlan, would be the doom of the Yalaini. The Olthoi rebelled and the Yalaini lost the war. After 100 years, all surviving Yalaini were pushed back to the island of Dereth, and almost 80 years later, one single Olthoi Queen arrived on the island and began to breed. With their last place of safety invaded, the remaining Yalaini retreated from the world. Asheron and his disciples cast a powerful planar magic spell known as The Sundering, which sent the Yalaini people into portal space in a state of stasis. After sending his disciples in as well, Asheron retreated to the last place of safety - his castle on a small island - and alone began working on a way to defeat the Olthoi.