What is demon bull king?

Demon Bull King is a character from the animated series called "Kung Fu Panda: The Paws of Destiny". He is a villainous character who was once one of the four legendary warriors who guarded the Emperor's palace. However, he was banished to the spirit realm by the Dragon Master for abusing his power.

Demon Bull King is known for his immense strength and powerful dark magic abilities, making him a formidable opponent. He is also arrogant and ambitious, seeking to overthrow the Jade Emperor and rule over all of China. He is also known for his loyal army of dark spirits, who will do anything to help him achieve his goals.

Throughout the series, Demon Bull King is shown to be a recurring antagonist and a major threat to the protagonists, the four young panda heroes who possess the power of the Four Constellations. However, as the story progresses, he begins to have a change of heart and starts to realize the error of his ways. Eventually, he sacrifices himself to save the pandas and restore balance to the spirit and mortal worlds.