Of course, the Iron Beetle's strength comes with a cost, and that cost is the Crystal Core. After all, as a fourth-order weapon, whether it's for nourishment or daily consumption, the use of Crystal Cores is considerable. Without a fair amount of funds on hand, it's truly unaffordable.
Moreover, one must always keep an eye on the Iron Beetle's HP. It's not a big deal if it's damaged; it can be healed using Crystal Cores, which just means consuming more of them. But if you let it die carelessly... Wang Tao has not yet encountered a weapon that has perished, but if a weapon's HP bar hits zero, there's a high chance it can't be saved. So, during regular use, one must be cautious and maintain it well. Even if you can't see the HP bar, as soon as you notice that the weapon is covered in damage and its status seems off, you must quickly recall it...
