English AI-generated marble race and physics simulation tournament video. Format: 4 contenders, HP battle system, shrinking arena, and sudden-death pressure. Featured contenders: Echo Mirror Clone, Aqua Prism Nova, Prism Homing Orb, Zenith Twin Oblivion. Grand final matchup: Echo Mirror Clone vs Zenith Twin Oblivion. Champion: Echo Mirror Clone. Rules: every fighter starts with 100 HP, collision damage accumulates, and the last survivor wins. Keywords: marble race, physics simulation, ASMR collision sounds, HP tournament, AI battle shorts. AI-generated content disclosure: enabled.
