A pair of realistic human lungs, pale and fleshy, hang like gnarled branches from an ancient oak tree, the leaves of the tree are a sickly yellow, and the air around the lungs is thick with a cloying, metallic scent, inside the lungs, a faint, flickering light pulses, like a dying ember, tiny, pulsating veins snake through the branches, oozing a viscous, black liquid, scattered around the base of the oak are clusters of small, fleshy objects, resembling shrunken human brains.