Glimpse an Alternate Reality: Complete the quest “Thirst for Blood”.
The Blood Crucible seems to have the capacity to hold an item. Place a piece of equipment into it.
If you miss the Blood Crucible quest item, you will not complete this quest.
Cannot find Blood Crucible? You must find the new NPC: The Last to Die. Travel to The Coast in the Act 1 and explore every place in this area. You will finally find The Last to Die. This NPC will give you a Blood Crucible.
The Blood Crucible seems to have the capacity to hold an item. Place a piece of equipment into it.
The Vaal device you implanted in yourself craves corruption. Slay monsters and absorb corruption to fuel the Crucible.
The Blood Crucible has had its fill. Activate it to temporarily Shift to another far more horrifying Wraeclast.
The Crucible produces mysterious transforming energies when it absorbs the corruption of the Scourge. Slay demons to fuel it further.
The Blood Crucible has had its fill of demonic corruption. Activate it to transform the item held within it.
Quest Complete – You absorbed corruption and activated the Crucible to transform an item.