While Klaus's friends prepare for their second battle, he and the three ladies were also holding their ground against the Void-stage snake.
Nari, Queenie, and Queen Lunara have defeated their targets and are now trapping them while they wait for Klaus, who seems to be in deep thought.
He is the only one who can kill them.
When he arrived at the battle, it was a single Void beast. But now, they are fighting four Void-stage beasts and winning.
However, Klaus wasn't okay with what was going on.
He could tell everything wasn't right. Something was amiss, and if he was not careful, he would end this battle in tears, so he was being cautious.
This is his first scheming contest with his enemies, and as such, he knows that being careless is the last thing he wants.
Naturally, he could sense something was changing about him, too. Whatever the change was, he could tell it would be determined the moment the heavens revealed themselves.