What defines the Power-up damage Classes 10%, 20%, and 50%?
After calculating the sums of the various values for Power_Up and multiplying it with F_alc – the Alchemy Level based efficiency factor – you get the so called Magic_Number. The value ranges of this number determine of what Power-up class the crystal will be: Magic_Number < 18 -> 10% damage Power-up Magic_Number >= 18 -> 20% damage Power-up Magic_Number >= 41 -> 50% damage Power-up So, for optimum results you will want to create recipes with a Magic_Number of at least 41, to brew the sought after 50% damage Power-ups.