The Gods killed the Chief Father of Gods and turned humans into their playthings. So, the gods gave humanity systems. They said it was a gift, but they lied. In a shattered world reborn through divine manipulation, power is everything. Mana blooms from the earth like poison, and every human is born with a system gifted by the gods, turning ordinary lives into a cruel game of survival. Except Marcus. A malnourished, forgotten boy with no abilities. No strength. No worth. Bullied, broken, and discarded, Marcus is left to rot at the bottom of society... until death comes, and passes him by. One year later, he awakens in a hospital bed with a prototype system called Tactical Management System, a failure meant to kill an ordinary human like him. Unbeknownst to the gods, a malevolent entity who vowed to kill every one of them was hidden inside the broken system. Hidden within Marcus, the entity begins to wake, and the world is not ready for what it can bring. Now, hunted by divine eyes, manipulated by a system slowly spiraling out of control, and armed with a dagger that whispers and laughs in his hand, Marcus is forced into a path he never asked for. And the deeper he sinks into the chaos, the more the world begins to fear a name once buried in myth: Beelzebub, humanity's last Hope or worst Enemy.