Skillful alchemists would first distill the ingredients and remove as many impurities as they could but Rezen still doesn't have the ability to do that
When a mage attempts to reach the Junior Rank, they have to cleanse their bodies but it doesn't mean that their bodies would forever be clean
Over time, a mage's body would accumulate more impurities again which is especially so when consuming potions. As such, there is a need for them to cleanse their bodies again
Rezen has yet to enter a 'developed society' in this realm but he still could guess that a potion with higher purity would be more expensive
He would practice distillation later on but for now, he wants to succeed in creating a mana potion first
After putting all the supplementary ingredients in the pot, Rezen then grabbed three blades of Vismian Grass
