Its in-game description reads "Valuable armband made of rare crystal."
This armband is a medium-tier weapon (Tier 4) : it'll gain 4 Synthesis Points (SP) after every level-up.
Build up The Crystal Brassard can be built up into the Platinum Brassard if you reach 50 in Attack and 54 in Flame.
It can also be built up into the Pocklekul with the following stats: 50 in Attack, 54 in Chill and Cyclone, and 32 in Exorcism.
Starting stats (When bought or found)Edit
|Weapon Hit Points||55||Synthesis Points||2|