It is painting with (your own) Blood
some are more freaky then this one above.
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Painting with their own blood for real? Seriously? So what's next? Art made out of pieces of cadavers?
Well I've heard of a fictional book that was wrapped in human flesh and inked in blood, just a concept, guess I wasn't too surprised someone had already done something like this and actually use their own blood to create a painting.
Besides, if I remembered correctly blood is potential biohazard.0