"A Being of Chaos - "Don Thousand" Emerges!!" is the one hundred and thirty-eighth episode of the Yu-Gi-Oh! ZEXAL anime. It first aired in Japan on January 26, 2014.

Vector continues to cause trouble, but then the power of Don Thousand, which should have been erased, revives once more, as he now becomes completely free of Vector's body... All of this has been Don Thousand's plan. With his body no longer tied to Vector, he now plans to try and absorb even Yuma. At that time, Mizar, who fought a fierce battle with Kite, appears, and challenges Don Thousand to a Duel.