Solo Glitch: I Convert Money Into Power

[System Alert: World Initialization Complete.] [Welcome, Players. Kill or be Killed.] When the classroom floor vanished, my classmates were gifted with Systems. They became Warriors, Mages, and Heroes. I got... Nothing. No Interface. No Skills. No Stats. Just a target on my back. Labeled "Trash" and used as bait by the people I trusted, I was left to rot in a dungeon where death was the only certainty. They thought I would die. They were wrong. I survived without magic. I fought without levels. I endured without a guide. And in the darkness, I found a different path to power. Now I’ve returned. And the "Heroes" who looked down on me are about to learn a painful lesson: You don't need a System to become a Monster.