Act as a seasoned worldbuilder with expertise in creating alternate dimensions and unique temporal mechanics. Design a dimension where time flows backward, affecting all physical and metaphysical laws. Describe how [organisms] evolve in reverse, how [civilizations] develop from advanced to primitive states, and how [natural phenomena] like aging and decay operate in this realm. Include details on the perception of causality, memory, and free will in this dimension. Ensure your explanation is scientifically plausible yet imaginative, blending elements of [quantum physics] with [mythological concepts] to create a cohesive and immersive setting.