None of the demons dared to use their Qi or any other resource to investigate the approaching annihilation. Therefore, they had no idea that this was the final move; it was so furious and destructive that instinctively they only felt terror and their minds did not reason.
All the annihilation energy was focused on the whale; even if they attacked now, nothing would happen.
Even if they knew, did they need to fear something beyond the heavens? Of course not. They were cultivators at the peak of the divine world, and this group of young people had only recently risen to divine realms.
But... they weren't dealing with ordinary youths. In fact, there were two sharp blades capable of killing even a Conqueror Empyrean, who was considered nearly immortal. And them? The leader and the counselors were True Empyreans who never dreamed of going beyond that.