Time is the only currency. Spend it wisely-or die broke. Joe wanted a normal life. Instead, he's trapped in a fantasy isekai tower where every floor is a death trap and every respawn costs him a year of his life. With an expiration date ticking down, even the smallest mistake pushes him closer to the grave. Each level brings new threats: kaiju-scale guardians, broken system rules, and factions clawing for dominance. But brute strength won't be enough. To survive, Joe must rely on a hacker's cunning, a rogue's grit, and a deck of volatile MadOrbz that plays more like a gamble than a gift. Guided by a flame-born entity that might be salvation or damnation, Joe uncovers the tower's hidden LitRPG deck building mechanics and learns that his climb is less about grinding levels and more about rewriting the rules. A Titan's Core blends the strategy of LitRPG rogue survival with the epic scale of portal progression fantasy and kaiju battles. For fans of isekai fantasy full of grit, danger, and sacrifice, this climb is only the beginning.