Who Wins This Physics Simulation? Prism Devour Core vs Cosmo Mirror Clone | Marble Tournament | Echo Rumble Session

English AI-generated marble race and physics simulation tournament video.
Format: 4 contenders, HP battle system, shrinking arena, and sudden-death pressure.
Featured contenders: Nebula Mine Scatter, Prism Devour Core, Cosmo Mirror Clone, Lunar Mirror Clone.
Grand final matchup: Prism Devour Core vs Cosmo Mirror Clone. Champion: Prism Devour Core.
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.