Stigma is the game system that involves the use of Stigma Stones and Stigma Shards to gain powers. The beauty of the Stigma system is it adds skills to classes that you would not, or could not, normally have. This brings an element of danger when engaging in PVP battles. You never know what your opponent has up their sleeve.
Stigma Stones have been imbued with the souls of fallen Daevas. To equip them in your available slots, you will need a Stigma Shard(Stigma). Stigma Masters require Stigma Shards to bind the Stigma Stones to the Stigma Slot.