Fill the Empty Apothecary's Flask at the Cauldron of Vrykul Blood, then mix the Flask of Vrykul Blood with Harris's Plague Samples nearby until you've obtained a Balanced Concoction.
Return to Chief Plaguebringer Harris when you've completed this task.
You've done well so far, <name>. I'd like to teach you some of my more advanced techniques, so that you gain a better understanding of the plague.
Take this empty flask and fill it with blood from the cauldron to my left. Mix it with the plague samples to my right until you obtain a well balanced mix.
How is your experiment going, <name>? Let me know if you have any questions behind the science involved!
Excellent! You are an apt pupil, <name>.
Now comes the fun part. Deployment!
Upon completion of this quest you will gain:
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