The moment the Primordial from the Heavens Court left, the mood in the space lightened.
Many expected a clash between Klaus and the Primordial. However, now it appeared that it wouldn't be happening. Of course, the reason for this wasn't because of Klaus or the four forbidden flame spirits.
While it is true that Nirvana and her siblings are monsters to be feared, they aren't unstoppable. As a Primordial, he possessed several treasures that could threaten them, so he had the means to get to Rhazor or Klaus.
The reason he left was because of Uncle Monk and the other Primordials around.
While on the surface they appeared nonchalant, he could tell they weren't hostile toward Paragon like he was. So, despite one of them killing a member of the Heavens Court army, he said nothing and left.
There could always be revenge later, and that alone was more than enough to show the kind of power he knew he couldn't go against.
