- Looted from Deepstalkers in Crestwood and on the Storm Coast.
- Looted from the deepstalkers in the Deep Roads.
- Looted from the Gibbering horror in The Raw Fade during Here Lies the Abyss.
- Sold at Crafting Materials store in the Black Emporium for 000000004040 (infinite amount).
- Sold at the Winter Palace merchant for 000000002020 (infinite amount).
Note: Requires The Descent DLC.