The Richest toxon in the whole galaxy is located under the sickly growing magma crust of the 97th moon of the Yob system (Yob97). Though the natives didn't realize it until 5010 B.B.Y. (Before the Battle of Yavin). Even after the Natives knew about the toxon they were not harmed because of their life-cycle. The Yobians realized they wouldn't ever be harmed from any toxon in the whole galaxy!
Yob97 is the base of the entire Yobian army. Its exotic landforms, toxic poison air, fire hazards, and black gravel grounds make it a last choice on the galaxy vacationer's list. The danger of Fire dragons, lava monsters, and rockslides also make it a must-leave to all who are not native to the moon.