It reads
"Defeat Maebroogha the Void Lich after only destroying Void Trap Shades while they are being detonated."
I am not sure to understand it exactly.
Is it that I have to give the final blow to the boss while the void shades are preparing their explosion?
Or is it only completed when I kill all void shades during this preparation for explosion during the entire fight if I cannot skip this at all?