They were not merely fighting; they were struggling to cope with the terrifying effects produced by the interplay of the various Supreme Great Dao powers.
For instance, no matter how hard the four—Queen Mother of the West and the others—tried to grievously wound a Sovereign, the Sovereign of Creation would instantly restore it to its original state. And whenever they attempted to seal a Sovereign, the powers of Time and Void would render their seals completely ineffective.
With the seven Sovereigns coordinating their efforts, the difficulty of the battle was far greater than fighting five of them. This was only with seven; it was terrifying to even imagine what would happen if the Eternal Sky-Reaching Tree were to manifest all ten.
Chapter 1300