After collecting the dark crystals and poison glands, Alex left the poison pits area, returning to the passage's entrance, a much safer place where no wandering creature came because of the previous presence of gemstone drake.
It would normally require the help of a Master Blacksmith and the use of Third Rank forging flame to refine the dark crystals from their poisonous nature into the desired material named the Etherealite Shards.
But Alex didn't need to go through such trouble to refine the dark crystals thanks to the selective refinement skill of the Red Gem.
Alex placed the gathered dark crystal into a single pile before using the selective refinement skill, covering them in a cloak of red mist.
The dark crystal's nature began to shift and change under the influence of the gem's power, and the poisonous aura that once surrounded them started to dissipate into the air, leaving behind only the raw essence of the crystals.