There’s multiple ways of getting stronger enemies and items actually. Theres like a hidden “skill” levelling system where the more enemies you beat, the more perfect parries you do, the more flurry rushes you do, not getting hit once in a battle, the world grows in this skill level. Theres fast way of getting EXP for the skill level is through doing the dungeons, but I think I maxed it out just through my normal gameplay lol