My God-Slaying Deduction System

My old life ended in a blink, only to awaken as Kasugano Yuu – broke, in a dilapidated house, and saddled with a clingy, demanding sister. Just as I thought poverty and chores were my biggest problems, a primordial Moon Goddess appeared, dragging me into a brutal divine conflict. A bizarre \"egg\" inside my soul, Dirac's Heart, revealed its purpose: to deduce the fundamental rules of existence by annihilating divine energy. Its first task? Force me to kill a War God fragment, then the Moon Goddess herself, to steal their power. Now I wield the crushing force of gravity and generate limitless energy, an unwilling Campione, a Demon King in a world of mythical beasts and hidden powers. But my newly acquired abilities, and the very system that grants them, demands more than just gods... it demands a new kind of 'scumbag' who will stop at nothing to reach the apex. And my little sister has no idea her brother just became a monster.