Once assembled, if it fails, the modules' spirituality will be greatly damaged, and the success rate for the next assembly will be directly halved.
If you fail a second time, congratulations, you have to start all over again.
This isn't even the worst part. The worst is that you can't assemble all the modules at once, but have to do it piece by piece, so you'll need to gamble many times.
However, it's often heard that the hardest part is the fusion of the first and second modules. Once the first step succeeds, the fusion of these two modules makes it much easier to integrate the third, thus increasing the success rate, and similarly, the success rate increases the further you go.
Therefore, once the Legendary Sword Spirit awakens perfectly, there's no need to worry about exchanging or maintaining modules, unless you forcibly insert a high-level module completely opposite to the Sword Spirit, which would result in indigestion and food poisoning.
