Each piece of equipment can be unlocked by collecting a set number of shards.
The number of shards required depends on its initial grade.
F 20 shards
E 40 shards
D 80 shards
C 120 shards
Only one copy of each piece of equipment can be unlocked. Any additional copies are converted to shards.
After a piece of equipment is unlocked, its shards can be used for synthesis.