A wave of disgust crossed Luna's face as she watched the man's flesh contort and mutate into what she could only describe as an abomination.  A cursed being... A... No. It didn't matter what he had most obviously turned into now.  A frown covered the knightess' face as he started to assault Niall again. This was not going to be an easy fight.  If she hadn't used up all of her energy using her magic on the thugs... No, that mattered little.  Luna gripped her sword with both hands.  She might be pushing herself a small bit, but she needed to make sure her blade could cut this abomination's body.  She mustered any of her magical energy available just to give her blade a small coating of light to make cutting easier.

If he was going to focus on Niall like this, Luna was happy to take a swing at him with his back turned.  Especially the tendons in his legs!  No matter the creature, it was difficult to move easily once those were cut, even if he could regenerate it could help ease the battle some.  She dashed forward and delivered a low swipe at one leg's tendon, bringing the sword back around to cut the other before swinging a departing attack toward his back before stepping back a small bit to give some distance between her and the opponent.  Even if he could regenerate the wound, it should give Niall and her a small opening to deliver some real damage to other parts of his body while he recovers.  Besides, no matter what he was, nothing regenerated indefinitely.