My Planet Became a Training Ground

When a cold system notification echoes across the world, humanity's fate changes forever. Earth—now designated Training Ground "Azure"—becomes a proving ground where interdimensional horrors descend and survival demands ruthless efficiency. As the Trial of Seven Deadly Sins begins, only the decisive will thrive in this dark new reality where every choice carries deadly weight. Our protagonist doesn't hesitate, doesn't falter—he acts, adapts, and conquers in a world where opportunity and annihilation walk hand in hand.