This mystery box appears to be a good value compared to selling the Crystal Braiding to a merchant.
This box always contains the following:
- ~74 Metal Shards (variable quantity 67-79 observed)
In addition to the shards, this box may also contain a Machine Core in any of the 3 sizes (Small, Medium or Large.)
Note that a sample size of 20 boxes was reviewed; further research & reporting on this box's contents is welcome.