Black miasma drop

Recently I went to farm eerie crystal for black miasma (level 31). Although it is listed as a common drop, it didn't drop even after 10 tries. Is there a certain way I have to defeat the crystal to get black miasma?

 

you can check in boss drop info
if it has hammer next to it you need to break certain part to make it drop or increase the drop rate

 

hammer with arrow = drop rate increases when a specific part is broken

hamner with + = it will never drop unless you break a specific part

 

I tested out various combinations breaking the boss, and I found one that makes black miasma drop more frequently for me. Its not 100%, but I can get about 5 within 30 mins. I also managed to get magic crystal armor too with this combo. My combo is to break the middle part that floats above the boss first, then the left side, then the right side. Im not sure if the difficulty affects the drop rate since I always do ulti to grind. I hope this helps yall

 

Let me guess, you use the necromancer class? ^_^

 

Elder Lich.