Psilocybin Zombies

I recently discovered a new species of psychedelic mushroom. The spores are released into the human body after ingestion, remaining in the circulatory system until death. The spores then settle and grow along the veins and arteries, eventually sprouting amongst the skin. The fungus then drags the body upwards out of the ground in order to feed off sunlight and other nutrients. A side effect that these mushrooms have is that it keeps the body well preserved, although it is unsure exactly why this happens.