Who Wins This Physics Simulation? Nebula Devour Core vs Nebula Missile Rain | Marble Tournament | Arc Rush Focus

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 Devour Core, Echo Blade Cyclone, Prism Inferno Field, Nebula Missile Rain.
Grand final matchup: Nebula Devour Core vs Nebula Missile Rain. Champion: Nebula Devour Core.
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.