Human or beast they all have one enemy the Mages, they who are born with the power to manipulate mana as they fit for their magecraft. The only way for mages to grow is through mana cores that coincidentally, everyone has when they are born. Therefore for anyone that isn't a mage beware they are coming for that which you cannot see, use or protect: your mana core.
Cause how do you fight against magic? Well, why don't you read on and see to find out how?