Heinald began to spend most of his time brewing potions and helping Albin with his experiments in the following days. Mostly, he brewed the Phoenix Feather Potion, Shied of Fire Heart, and Distilled Thunder Essence potions because they were in his monopoly and were the most profitable potions of any potions he could brew. He and Albin encountered the same results in all of their experiments and failed to make any progress.
Of course, Albin hadn't accepted the apprentice just to have him participate in the experiments. After all, Albin, as a famous potions grandmaster, was brewing various potions to some large families and organizations and getting incredible resources in return. Knowing his apprentice's ability to wield the Spirit Flame, he commissioned him to destroy the toxicity in the ingredients needed to brew these potions.