Echo Mirror Clone vs Prism Mirror Clone | Marble Race Physics Simulation Tournament | Comet Showdown 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 Inferno Field, Echo Mirror Clone, Prism Mirror Clone, Cosmo Inferno Field.
Grand final matchup: Echo Mirror Clone vs Prism Mirror Clone. 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.