That doesn't bode well. Though Kirk has lived with his condition for over years now, he still considers it a corruption. It only takes a few days of not drinking blood before he acts more like a rabid beast than a man. It's a tightrope he walks every second and it's why he hasn't given up on making a cure. It sounds like this dark substance is something he'll have to stay clear of.

"How prominent is it? Is there a way to cure this corruption?" He asks.