Lucien knows Amelia is a fantastic swordswoman, so he summoned his katana, to show her that he has a soul weapon just like she does.
But why did he stabbed the katana in the ground? Because he wants to show her that he is limiting himself, but still confident enough to beat her without a weapon.
He knows that Amelia is very powerful, but he wouldn't be able to fight her with a weapon while holding back enough to not harm her. He doesn't want to take any chances of hurting her.
Still, Lucien had hopes of winning, or rather, confidence in his speed. Because it increased even more after he reached the Mortal Realm and absorbed Aylin's Naginata into his soul.
Of course, the difference between Lucien, who is in the first layer of the Mortal Realm, and Amelia, who is in the seventh layer, is still quite significant.
Lucien kissed Lust while she mentally asked him. 'Are you going to use that?'
He replied. 'Yes. I need to show her that my methods are the most effective.'
I cannot deny that I'm sad by some comments in the previous chapter. I know my limitations, and I know that my release rate is not as good as that of other authors. I'm trying my best to give you a good story, but I'm not asking for anything in return. In the beginning, I even asked you to vote with power stones, but now I don't ask it anymore, but I thank you. I see every vote of yours, and it encourages me to keep trying my best. But how is it fair to me that someone comes here and says that they don't vote for me because I'm inferior to others? I know that I am inferior to many. I don't need to be told that. Also, I don't need you, my readers, to tell me that such an author is much better than me. I would like to have a contract with WN, but I don't have it when many other authors can deny it. I don't have a contract with WN because I want to maintain the "wincest" that many of you want to see. So please think carefully before making offensive and meaningless comments.