As Eisen was holding he two spheres for the creation of the Death Prevention Potion in his hands, he began to the procedure to combine them, artificially splitting his mana up into two types, and then bringing it together again to merge the two materials.
There was a very good reason why Eisen couldn't make this potion beforehand. He had to use this ability, that he only gained once his Alchemy Rank rose to 3 to make this potion, as he needed to merge them in an extraordinary way. The two types of mana that he would use to combine the black and white crystal spheres each had to spiral around, opposite to the direction as they needed to when Eisen extracted the liquids in the first place, meaning that he spiraled the mana in the white sphere counter-clockwise, and the mana in the black sphere clockwise.
