Blood magic was not the only magic he was using, nor had he finished. The cold writhing shadows and darkness of the tavern had enclosed them, creating a sphere-like bubble just out of arms reach around them.
The outside world was visable but it was like looking through frosted glass, every thing and one was just shades and blurr's of shadows, all moving incredibly slow, trapped in time. Or had they just sped up. 

No time to think about it, the strangers blood reacts to the sudden flare and aggression that flashes across his face, and the soft gloving liquid that was being absorbed and integrated suddenly and viscously solidifies into something like that of a peircing sharp thorny vine.