Epic Marble Race: Echo Radiant Laser vs Cosmo Mine Scatter | AI Physics Battle | Rift Rush Chapter

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 Radiant Laser, Aqua Blade Cyclone, Cosmo Mine Scatter, Nova Bounce Spike.
Grand final matchup: Echo Radiant Laser vs Cosmo Mine Scatter. Champion: Cosmo Mine Scatter.
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.