Ragnar was confused, not because Zaroth was able to push him to that extent, nor because he had an undead dragon under his command—something that only his father should have been able to achieve. No, it was because of the blade he wielded.
As Ragnar slashed and the world lost color for the countless time, Zaroth met his attack, not backing down, the two were staggered back momentarily.
Under the assault of Zaroth's beast, Ragnar didn't have much time to think, yet his eyes always spared a brief glance at his odachi after each attack they exchanged.
'It has something to do with these runes!' he realized.
It wasn't inherently impossible for his attack to be matched in strength, but Zaroth's weapon should have been broken long ago.
Yet it hadn't—the only way Ragnar could explain the reason was because these runes played some kind of crucial role.
Even if he disliked the elves in general, he was well informed about their runes and was able to recognize their work instantly.