Who Wins This Physics Simulation? Echo Radiant Laser vs Echo Thunder Spear | Marble Tournament | Titan Dome 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: Echo Prism Nova, Echo Radiant Laser, Echo Thunder Spear, Aqua Thunder Spear.
Grand final matchup: Echo Radiant Laser vs Echo Thunder Spear. Champion: Echo Thunder Spear.
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.