English AI-generated marble race and physics simulation tournament video.<br />Format: 4 contenders, HP battle system, shrinking arena, and sudden-death pressure.<br />Featured contenders: Echo Mirror Clone, Prism Thunder Spear, Nebula Missile Rain, Prism Mirror Clone.<br />Grand final matchup: Echo Mirror Clone vs Prism Mirror Clone. Champion: Prism Mirror Clone.<br />Rules: every fighter starts with 100 HP, collision damage accumulates, and the last survivor wins.<br />Keywords: marble race, physics simulation, ASMR collision sounds, HP tournament, AI battle shorts.<br />AI-generated content disclosure: enabled.
