Vortex of the Chaos Dragon: A Branches Book (Dragon Masters #30‪)‬

Drake and Worm face off against the evil wizard Maldred with the help of the mysterious Chaos Dragon in the latest action-packed installment of this New York Times bestselling series perfect for newly independent listeners!
The evil wizard Maldred has been turned into one hundred mini-Maldreds! Dragon Masters around the world are battling them, and it's up to Drake, Worm, and their friends to stop Maldred once and for all. Drake, Rori, Bo, Ana, and their dragons travel to Goryeo to meet the Chaos Dragon Seong-Min and her Dragon Master Ji-Min. Seong-Min is the only dragon powerful enough to stop the chaos the Maldreds are causing! But Ji-Min warns that the Chaos Dragon is very difficult to control, even for her. Will Drake and his friends convince Ji-Min to help them defeat the Maldreds? What will happen when the Chaos Dragon uses his powers?