English AI-generated marble race and physics simulation tournament video. Format: 4 contenders, HP battle system, shrinking arena, and sudden-death pressure. Featured contenders: Volt Thunder Spear, Cosmo Sentry Totem, Aurora Missile Rain, Echo Thunder Spear. Grand final matchup: Cosmo Sentry Totem vs Aurora Missile Rain. Champion: Cosmo Sentry Totem. 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.
