Arcane Exorcist

Yin and Yang, Order and Disorder, Life and Death, The Universal Equation of Balance.
My world was once in Balance, until it came, The Arcane Drift. A massive flare of Mana flowed through Earth, giving birth to The Arcane Prime, soul like entities formed from pure Arcane energy. Humanity was devastated, as half of earth's population were wiped out due to Mana toxicity. The Half left behind were soon preyed on by The Prime's. We couldn't defend ourselves, as Humanity brought down to it's knees.
Decades Later, we had a breakthrough. Humans, who were once preys, instantly became predators. The Hunted became the Hunter.
Despite the fact we couldn't wield Arcane, we found other means to defend ourselves. By drawing power from Yin Yang Force Factor, Humans finally had the upper hand, as they went into all out war against The Primes.