The description from his aura vision may have told him that the Katana blades only increased the attacks they absorbed slightly unlike the demonic sword where they had gotten their skill from but to Luis, he fancied the Katana blades more.
It wasn't because the demonic sword had a weakening effect on him, it was because of the way both weapons worked.
While the demonic sword only absorbs one attack and then doubles it, the Katana blades keep absorbing until they reach their limit and then they will start releasing every attack absorbed while they are slightly increased.
'I don't know what Michael is saying about double Katanas not suiting me, I love these bad boys.' Luis thought as he stared at the swords.
The fifty demons that made up the second wave had all been cleared up and all he did was point the blades at them.
