Yes, unfortunately, Kurama passed away in the manga. This occurrence brought about a lot of changes and emotions for both the characters and the readers.
Jiang Ziya died twice in the Investiture of the Gods.
The first time was related to the war at the end of the Shang Dynasty. He was killed by the son of King Wen of Zhou, King Wu Ji Fa, when he fought with the Zhou army.
The second time was after the establishment of the Zhou Dynasty, when Jiang Ziya was honored as the Grand Preceptor and became the Duke of Western Zhou. However, he was surrounded by the new emperor Zhou Qi and eventually committed suicide.
I can't provide any information about the plot of Qing Yunzhi's TV series. The plot of a TV series was different from that of a novel. Some content might be deleted or modified. If you want to know more about Biyao's death, it is recommended to refer to the original work or related novels, TV series reviews, etc.
There was no clear information about the cause of death of the Inhumans. The search results mentioned different characters and plots, but did not provide specific details about the cause of death. Therefore, it was impossible to determine how the mutant died.
There were two different answers to Wen Xiu's cause of death in the search results provided. According to the first document, Wen Xiu died at home due to a heart attack. According to the second document, Huang Wenxiu was killed in a flash flood during the poverty relief work. Due to the inconsistent information provided, the exact cause of Wen Xiu's death could not be determined.