With his whole body being turned to a source of light - or fire to be more exact, the forest green humanoid demon didn't see his surroundings as complete darkness anymore.
In fact, he couldn't even see anything clearly as the pain that assaulted his whole body, being burned alive by the dark flame, was more than enough to overload his sensory organ, making him only able to feel the throbbing pain that his whole body was subjected to.
Although there were severed body parts, there wasn't any blood, or at least a flowing one that made the area wet since the dark flame really did its job very well, drying out the forest green humanoid demon's blood that made contact with it while continuing its task to eat the flesh that it had latched itself to.