"How?"
Not just the Gnomes, even the Eighth stage Sovereign who Klaus just helped was shocked by Klaus' display of power.
He ambushed a Seventh stage Sovereign Puppet that was fighting with one of his companions who was a Seventh stage Sovereign, and other than destroying parts of its body, he was not able to take it out, even with help. Klaus, on the other hand, was the one who was ambushed by a Seventh stage Sovereign Puppet while facing off three other Puppets of the same strength. Not only did Klaus not escape unscathed, he even managed to kill the Puppet that ambushed him while at it.
The Gnome whose Puppet was destroyed could not believe what just happened. The Puppet just ripped a Sixth stage Sovereign apart, and in barely two seconds after that, his Puppet was not only frozen solid, but it was also destroyed.
The three Gnomes made their Puppets retreat as they did not expect Klaus to be this powerful.
