Tech Tree
It can be dropped by killing monsters in the wilderness area. The more chaos aura you carry, the more blackened monsters you can find. You can also submit it at the "Frost Idol" in the Frost Realm to unlock additional attributes. When you die, you will lose part of the chaos aura you carry. The dark power that permeates the other side of the maple leaves. Coming from an unknown world, it always disturbs the visitor's consciousness.
How to get it
Choose a known source and open it for encounter details.
Monster sources
Hunt these monsters or open their card entry.