Poison is a conjoined elemental force representing corrosive vitality, transformative decay, and weaponized biological destabilization. It embodies the paradox of life and destruction operating simultaneously, enabling magic that erodes, infects, mutates, and destabilizes targets over time. Within Lúmenai, Poison is an Entwinement expressing living corruption and alchemical entropy. In Cymora, Poison manifests through fluid, burning resonance that destabilizes both physical and metaphysical structures. Within the System of Royastella, Poison-aligned abilities exist primarily among external invaders, as conjoined elemental manifestations are canonically exclusive to hostile forces opposing the realm. Poison is corrosive vitality and burning fluidity.