HP Tournament Finals: Echo Devour Core vs Volt Thunder Spear | Marble Race Showdown | Nova Showdown Play

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 Devour Core, Echo Devour Core, Cosmo Twin Oblivion, Volt Thunder Spear.
Grand final matchup: Echo Devour Core vs Volt Thunder Spear. Champion: Echo 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.