Blade of Rebirth

Compose the complete instrumental game boss theme "Blade of Rebirth", around three minutes, for an original Japanese FC-era military wasteland RPG. This encounter is a precise, cold biomechanical guard inside a white medical facility hiding forced transformation. Make it a playable battle with determination and forward motion, not a funeral or ambient horror. Use an unmistakable strong square-wave lead melody from the opening eight bars, a second square-wave countermelody, an active triangle-wave bass, short noise-channel snare and closed-hat accents. A restrained minor-mode hymn motif built from scale degrees 1-3-5-3 appears as an answer under the main riff, representing the facility's calm coercive authority. Approximately 144 BPM, 4/4, crisp four-voice chiptune texture, no vocals, choir samples, orchestra, guitars, cinematic impacts, literal gunfire, hospital sound effects or extended introduction. Use a clear A-B-A development: a sharp clipped rising melody; a contrasting lower hymn-like reply that retains rhythmic drive; an intensified return with a second melodic voice. Leave space between phrases. End on a rhythmic pickup compatible with returning directly to the opening, without a fadeout or long silent tail. Preserve memorable melody and clean bass, avoid random arpeggio filling or excessively harsh high pitches.