Dyssidia emerge with purpose on “Serum Sickness,” a tightly wound and venomous new single that signals a bold new chapter. The track moves with intent, weaving cryptic lyricism into layered, dynamic shifts that feel tense, fluid, and emotionally charged. Mitch Brackman delivers a gripping vocal performance that balances restraint and release, while the band locks into a sound that feels precise yet atmospheric. It is focused, fearless, and alive with momentum, and it stands as a powerful statement of clarity, confidence, and forward motion.