The moment Klaus's first attack was blocked by the monk, he sensed something wasn't right. At least, the bald fellow should have taken a step back, or his leg buckled.
But none of that happened.
Of course, Klaus is no immortal, nor did he use the Immortal Ring he had absorbed to amplify his attack. He merely wanted to see something, so he used his raw strength.
However, the force behind that slash was strong enough to force a Peak Real Immortal to their feet.
Klaus is a peak Empyrean with nine immortal-level cores. If anything, his strength is nine times that of an Early Immortal. In simple terms, that attack was a combined assault by the Nine Early Immortals.
Even a Peak True Immortal would be forced back, considering the weapon in question is not normal.
However, the monk took the attack between his fingers as if it were a normal thing to do. That was when Klaus knew he was depending on an external force.
