King Grey had it all: unrivaled power, wealth, and prestige. In a world where personal strength decided the throne, he was the uncontested sovereign. But when his violent, ambition-driven life ends abruptly, he finds himself in an unimaginable position: reborn as a crying infant in a strange new world. This new existence is steeped in powerful, ambient magic—mana—unlike the internal life force of his former world. But Arthur Leywin is no ordinary baby; he retains the consciousness, cunning, and tactical genius of his adult kingly self. He refuses to wait for destiny. Utilizing the knowledge gained from his previous life as a warrior and ruler, he begins training to cultivate mana years before any normal child should, guaranteeing himself a phenomenal head start. His premature awakening at the age of three leads to an unprecedented explosion, confirming his genius. But Arthur’s power is more complex than simple genius. He possesses the capability to manipulate all four basic elements, marking him as a mythical quadra-elemental mage.