|“||It was never my destiny to stop you. I have sent another on that path.||”|
|—Oogway having his chi taken by Kai|
The Oogway and Kai rematch was the encounter of the two former friends in Kung Fu Panda 3. The battle involved Kai's attempt and success in taking Oogway's chi, which resulted in him being able to escape the Spirit Realm and return to the mortal world.
Main article: Battle between Oogway and Kai
Oogway was meditating under a peach tree, trying to achieve inner peace but was constantly irritated by little things like falling leaves. Once he found the solace he needed, he was interrupted by a jade double chained axe flying towards him.
Annoyed, he caught it with ease and throw it towards its source, successfully deflecting the other end of the axe which was heading towards him. Upon being attacked, he instantly recognized his attacker as Kai. The latter, perched on a floating island, challenged him to a rematch, to which Oogway agreed mockingly.
Enraged, Kai charged forward and leapt off the island, slashing through any obstacle standing between them. He launched both axes at Oogway but the tortoise evades them quickly by jumping. This results in a huge collision and the floating island Oogway was on starts to collapse.
Mid-air, Ooway uses chi against Kai with his staff and remarks that he had grown stronger. Kai seems unaffected by it and reveals that he had taken the chi of every deceased kung fu master in the Spirit Realm. Kai launches himself towards Oogway with two large boulders in tow while the latter conjures his chi into a ying and yang symbol and directs it towards Kai. Oogway is thrown off and captured by Kai's chained axe.
As Kai slowly harnesses Oogway's chi, he remarks that gaining his chi will enable him to return to the moral realm and Oogway could not stop him. The old master slowly and peacefully says that it was never his destiny to stop him as he is certain that Po would do so. Finally, closes his eyes and accepts his fate.
With the chi, Kai manages to gain access to the mortal realm and materializes in a field, ready to take the chi of every living kung fu master.