you need to farm brimstone bosses, do chest runs really and find a route for named mobs.
Might not be worth farming though, as you cannot put flame attunement on it - think there is a bug with crafting, with attunement perks in the kiln.
Does anyone know of a good way to farm this?
For an efficiente farm you can kill the following four enemies in Digsite Calamitous repeatedly:
- Harrow the Sickle
- Frostcalle Fawzi
- Thorgar the Destroyer
- Farouk al-Talib
They have a 6 minutes respwan timer.