Calmly the young man offered his wrist to Severus, not taking his eyes off the Dark Lord. The cut was diagonal and had barely grazed the bone. Within moments, it was closed, and the Potion Master held out a blood replenisher. The Dark Lord watched their interaction with hawk's eyes, and Severus was no longer strong enough to suppress the shivers that whacked his frame. He flinched, when Potter touched his arm, squeezing him reassuringly. "It's okay. It's over now, Professor."