Grapple Modules in The First Descendant are Modules that you can use in the Sub Module slot instead of sub-attack modules. These Modules not only increase the maximum capacity, but also improve the functionality of your grapple.
Here's how to get the Long-Distance Maneuvering Module in The First Descendant and what it does.
There are a few methods to farm the Long-Distance Maneuvering Module in The First Descendant, but the optimal one is the Hard Dead Bride boss fight. It's not too difficult to beat, especially if you have a well-built Lepic or other Fire Descendent, and you can open linked Amorphous Materials at the same time.
Below are all the activities that drop the Long-Distance Maneuvering Module: