Simply put, the emergence of Elemental Spirit Crystals had greatly strengthened non-Mage Class Users.
For non-Mage Class Users, this was a blessing. For Mage Class Users, however, it was rather terrible.
Fortunately, the emergence of Body Tempering Milk filled that gap.
After Cheng Xiao and the other Mage Class Users tested it, they discovered that Body Tempering Milk balanced the disparities between a Class User's various attributes.
Take Tank Class Users and Mage Class Users, for example.
The attributes Tank Class Users took the most pride in were their Health Points and dual defenses.
Their class requirements meant they did not need to cast many skills. They only needed to hold the front line, so Mana and magic attack were Tank Class Users' greatest weaknesses.
However, after drinking Body Tempering Milk, those attributes would gradually be leveled out.
A Tank Class User's magic attack, Mana, and other attributes would gradually rise toward the level of their Health Points and dual defenses.
Put more plainly, it raised their weaker attributes to match their highest ones.
Body Tempering Milk was somewhat lackluster for Tank Class Users. After all, so much Mana and magic attack could not provide them with any effective improvement. Their skill multipliers were right there, and no matter how high the numbers became, they still seemed rather useless.
But for Mage Class Users, it was a blessing.
Compared to other Class Users, Mages possessed extraordinarily high magic attack and Mana.
In order to output as much damage as possible in actual combat, a Mage's magic attack and Mana were often absurdly high.
As long as they consumed enough Body Tempering Milk, it would be an Epic Grade enhancement for Mages.
A body comparable to a Tank's could provide an extremely high margin for error in battle. That way, they