Magebreeding is a magical technique that alters the form of creatures by transferring strings of soulknots from one species to another during gestation. The most prevalent result of magebreeding in Ruengoethe are the Slavebred, who are a combination of domesticated animals and humans. The process of magebreeding is an extraordinarily complicated act of tuning that requires masterful practice in both the art of husbandry and magic, usually demanding the attention of multiple mages and scholars over generations. The practice is not common among humans, primarily due to cultural and religious prohibitions, as well as their shorter lifespans. Some relics of the Nonman traditions of magebreeding, known as “legacy” creatures by some bestiarists, still exist, and some scholars contend the Fae themselves to be magebred humans.
Most magebred creatures and plants are produced by the Autumn Court, especially since the fall of the Spring Court. They maintain strict control over the trade of their magebred products, ensuring that most of them are sterile so that nations are forced to continue maintaining trade relations with the Apsara. Moreover, the Autumn Court will only trade with those who sign a treaty saying that the nation will not attempt to copy the process that produces the magebred products that the Apsara create. The Delvers are also known for their magebred beasts, which have a unique characteristic due to being created in the presence of Fellwright.