WARNING: SYMBIOSIS FAILURE (AUTOIMMUNE RESPONSE)
Two species, Green (Host) and Blue (Symbiote), exist in a delicate balance. They need each other: Blue feeds on Green's byproducts, and Green relies on Blue for defense. However, occasionally, the Green Host's recognition system glitches, misidentifying its Blue partner as a parasite. It launches an aggressive autoimmune attack, hunting down and destroying the very symbiotes it needs to survive, ultimately leading to mutual extinction.