Too focused on fighting against Nero, Lux didn't even notice that Jasper had appeared behind him, about to launch a sneak attack.
However, even if he noticed, he wouldn't care because he wasn't fighting alone.
There was a reason Asmodeus and Diablo weren't joining his fight, and that was because they were on the lookout for any potential threats that would take advantage of him as he fought against a Ranker, whose strength surpassed his own.
The Half-Elf knew that his Named Creatures were always watching his back and wouldn't allow anyone to hurt him as long as they lived.
This was why Orion and Pazuzu engaged with Nero even though they had no chance of winning. It was all to give Lux an opportunity to catch his breath from the continuous one-sided beating that he received from the teenage boy who had been corrupted by the power of the Abyss.
Now, the Ranker who had beaten him a few minutes ago, was pleading for him to stop, but the Half-Elf had no intention of doing so.