《影之刃零》装备升级指南：NPC与材料

Every piece of equipment in Phantom Blade Zero, from main and secondary weapons to accessories and medicine, can be upgraded by meeting certain NPCs and gathering the right materials. Weapon upgrades require metals and solvents that vary by weapon class, and both main and secondary weapons gain additional perks at levels 5, 10, 15, and 25. After first talking to the four upgrade-related NPCs, their functions unlock permanently at every bell and fast travel point.