Master Fung tells the Warriors that one of them will soon advance to Wudai Warrior level, and each one is convinced that it is them. A new Shen-Gong-Wu is revealed, the Ying Yo-Yo, which acts as a portal to the Ying-Yang world. After losing the Wu, the Warriors learn that Master Fung has been taken and transported to the Ying-Yang world, but they cannot rescue him without the Ying Yo-Yo. Omi goes to Chase Young for help, who agrees to assist him. After finding the Yo-Yo, Omi enters the Ying-Yang world and rescues Master Fung, but upon leaving, Omi's good chi stays while his bad chi begins to take over . . .