Xander - Babs ; Cara (later)
Xander threw himself at the invisible creature that was mounted on top of Babs. Definitely a creature. Magic didn't exactly need to form a figure to do it's bidding. Not always, in his experience. If one was clever enough with their spells, they could just make a person rip apart by themselves without having to put the effort in to make a creature invisible to get at someone. But then again, Xander didn't know too much about magic to begin with. Nonetheless, whatever Xander's body smacked into definitely didn't feel like something that could have existed solely through magic. It felt real. Like a living, breathing creature...only it couldn't be seen. It was large, it was strong, and it easily sent Xander flying backwards and into the air. His shoulder slammed into the side of a car, glass crumbling under his body on impact. The creature growled in fury and Xander slid off the car and began to fire his gun.
He must have hit something, because eventually Xander heard a loud yelp. Rather than being attacked outright, he found that he was left standing in the middle of the street waiting for absolutely nothing to attack him. Stunned, Xander ignored the pain in his shoulders and looked back to Babs. There was an entire battle going on all around them. People were screaming. They were fighting. But the only thing that Xander could see was Babs; covered in blood, ripped through, and looking for all the world like she had been completely destroyed. Was she...? No. No.
Xander fell to her side and reached for her shoulder. "Babs? Babs?" She needed a doctor. Oh God. Where was Martha?