Battle Through the Heavens was a fantasy novel. There were many changes in the plot and the strength of the characters. It was impossible to determine who was the strongest in the end. The strength rankings in the novel were also constantly changing, and there was no official standard to determine the strength rankings. However, based on the plot and the performance of the characters in the novel, one could determine which characters were the strongest, such as Xiao Yan, Yao Lao, Tian Can Tu Dou, etc.