I Spawned at Level Zero on the Final Floor [Weak to Strong / Brutal Isekai]

Meet Vance 'why-the-hell-me' Moretti: delivery man, college dropout, and the universe's most unfortunate summoned hero. One Monday morning, a floating crystal called the Nexus ripped him from his bathroom and dropped him into the final boss chamber of a primordial dungeon. Level zero. Zero skills. Zero mana. A sleeping dragon the size of a building beside him, and six other strangers who panicked, ran, and died within minutes. The Nexus doesn't care about Vance's confusion, his trauma, or his survival. It has a cancer problem on the fifth floor, and Vance is the only test subject still breathing. Now Vance is fighting his way up from the very bottom, dumping every stat point into mana, inventing deadly skills the system refuses to recognize, and dragging a party of friends toward a floor they're not ready for. No classes. No cheat abilities. No prophecy. Just a creative man with a lot of mana, a brutal situation, and the stubborn belief that if he gets strong enough, he can forge his own path in a world that never asked for him. What to expect: ▶ Consistent updates (1 chapter per day at first, then 4 chapters per weak) ▶ Weak to strong progression with real cost (every power-up comes with a price) ▶ A scientifically minded MC who treats magic like a problem to solve ▶ An alien mentor with zero empathy and peak comedy ▶ Found family party dynamics with genuine depth ▶ Slow-burn romantic subplot (no harem) ▶ A system that feels like infrastructure, not a game  (built by ancient civilizations with rules that can be bent) ▶ Dark themes handled with emotional maturity (trauma, guilt, moral dilemmas, and the weight of a first kill) ▶ Dungeon floors that each demand different strategies (not just bigger number / harder monsters)