Freyja ignored the goading from the creature with her face and slammed into her, with a combo of shoulder bash and magic shield. She had never been one to trash talk with an enemy, never been one to spit nasty words in the heat of battle. She had always considered that she was there with a role to play, and that she was fighting for honour. There was no honour in the things coming out of the lips that matched hers right now. Seeing herself saying them was jarring though, was almost enough to throw her off.
When she'd been talking to Merlin about this, she had set up a backup: an emergency portal that she could open to wherever he was, so that he could offer assistance. Freyja didn't want to have to use it if she didn't absolutely have to. That level of magic would completely exhaust her, and there would be likely nothing else she'd be able to conjure for a long time.
So instead of drawing on more magic, she punched the other Freyja in the stomach and followed it with bringing the shield up under its chin to slam its head back. The action knocked the copy back and Freyja pushed forward, kicking the side of one of the vardøgr's knees hard enough that it would have snapped if it were a mere human being. It didn't break, but it did knock the vardøgr down enough that Freyja could grab it by the neck, hooking her arm around to choke the foul beast. The sounds it made were Freyja's own and it was unsettling.