English AI-generated marble race and physics simulation tournament video. Format: 4 contenders, HP battle system, shrinking arena, and sudden-death pressure. Featured contenders: Aurora Prism Nova, Prism Prism Nova, Lunar Homing Orb, Volt Mirror Clone. Grand final matchup: Aurora Prism Nova vs Volt Mirror Clone. Champion: Volt 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.