In Lustana, there is a tribe of Beast Masters called the Undiri. The Undiri are human/elf hybrids that have exceptional strength, speed, and endurance. The Undiri serve the Goddess Root, which is a large mystical tree in the center of there city. The entire tribe lives within the city of Karakot.
The Beast Masters of Lustana have mastered an ability known as bonding. Bonding stems from energy manipulation and while it is related to tethering it acts in a much different manner. Bonding can be done with almost any animal as long as their brain is complex enough. It is not possible to bond with another human. Bonding works by connecting the souls of two living creatures via their life force. The bonded souls share a deeper connection allowing for something reminiscent of telepathic communication.