Rin's about to answer when his eyes catch on Stocke cutting into himself. The sight of shade blood is momentarily distracting, watching it flow in wispy tendrils rather than the heavy drips of organic blood. The smell is different too, like charcoal instead of copper. Not nearly as appealing to his raptor side.

He manages to shake himself out of his daze, as he realizes Stocke is waiting for his cue to stop. "Ah, just a vialful she said."

Of course, Mana couldn't have been more specific about the size of the vial so he'll just have to assume something average.