Seed Immunity - NES Boss Theme

Original full-length FC NES chiptune boss theme for Wilderload. Title: Seed Immunity. About two minutes, complete instrumental music with an end-to-start loop. The hunters confront a giant crystalline reptilian immune system inside an alien seed network; two living tendrils support its shell. Start with an immediate memorable attacking melody, not a long introduction. A low triangle-wave pulse on the first beat of each four-beat phrase is the core motif: steady like a machine breathing, transformed into a mobile energetic bassline under urgent high-register pulse-wave melody. Two clear melody voices answer and interlock; strong noise-channel drums and sparse short DPCM kick support resolve, pressure, sustained assault and the satisfying opening of a shield. Theme A should feel immense resistance; a contrasting second section feels like counterattack against an exposed core; return to the main hook. Dry authentic 8-bit synthesizer voices, limited channels, no real instruments, no vocal choir, no reverb or cinematic orchestra. No literal heartbeats, roars, explosions, electrical SFX or wind; those are separate game sounds. Keep attack sounds readable above the mix. Forceful, tuneful and determined, not slow mournful ambience. No long fade at the end; musical cadence should reconnect to the opening.