Create an epic hard & heavy metal song with a gradual build from acoustic intro to full heavy metal chorus. Start with clean acoustic guitar, slightly melancholic and atmospheric, with light ambient synth pads in the background. Add bass and restrained drums in the verse, keeping tension and anticipation. Then explode into a powerful chorus with classic heavy metal distorted guitars, galloping rhythm, melodic lead guitar, punchy bass, and thunderous drums. Use choir vocals in the chorus for a grand, anthem-like feeling, with layered harmonies and gang-style backing vocals. Include tasteful synthesizer elements to add depth and cinematic texture without overpowering the guitars. The sound should feel dramatic, heroic, energetic, and emotional, combining vintage heavy metal spirit with modern production quality. Strong hooks, memorable chorus, dynamic arrangement, and a triumphant yet dark atmosphere.