"Covariant Arena" is a closed-loop experiment exploring the interplay between mechanical logic and biological instinct. Through the continuous mutual construction of algorithmic decisions and physical feedback, the installation materializes the perceptual dilemmas of modern existence into a perpetual stalemate. As rule iterations and behavioral adaptations enter a self-excited state, the distinctions between rationality/instinct and control/chaos are exposed as functional illusions—all actors ultimately devolve into essential components sustaining the system's self-perpetuation.