HP Tournament Finals: Cosmo Sentry Totem vs Nebula Mirror Clone | Marble Race Showdown | Echo Cup Moment

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, Cosmo Sentry Totem, Cosmo Bounce Spike, Nebula Mirror Clone.
Grand final matchup: Cosmo Sentry Totem vs Nebula Mirror Clone. Champion: Nebula 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.