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'Amethyst Deciever' by Andrew Barrett
(lemmy.ml)
The mushroom itself is edible, but can absorb arsenic from the soil. Because its bright amethyst coloration fades with age and weathering, it becomes difficult to identify, hence the common name "deceiver" wikipedia
What, you couldnt be bothered to find a dead rodent to clutch it in its skeletal hand for the photo?