Is This Natural Disaster My Own?

"There are always people who slander my brother Xia En as an evil god, and inexplicably say that he will bring the most terrible natural disaster to Taiya? These mentally twisted people are always talking nonsense!" In the 11th year of the Eighth Era, Pope Alan of the Revival Sect said this to the senior leaders of the Taiya tribes at the Taiya Prospect Conference. "My brother Xia En has always had only one purpose, and that is to bring love, peace, and a future of infinite hope to the Taiya tribes..." In the 53rd year of the Eighth Era, the pope of the Renaissance Church led his believers on a space carrier, held high the banner of revival, and drove countless air and space fighter planes to form a torrent of steel that flooded the entire Taiya. "The remnants of the old era! Accept the judgment of natural disasters!..." [Based on the above information, answer what is the biggest natural disaster in the history of Taiya's development, and explain why it is Xia En. (Emphasis added)——Extracted from "Taiya Historical Documentary Series"