Nyxiontus is like the /coc/ equivalent to Frieza in terms of seemingly unchangeable power. This works against him in a meta sense since whenever he is draw in the doodles/drawpiles it's always someone beating him to show how much more powerful their theoretical hypothetical power up is.
That just doesn't track if he's supposed to be someone so powerful that he's grown bored that no one can even challenge him. We have almost nothing established about the space he controls either. I assume it's another space empire where he has people to run things for him and if he doesn't like what he sees, he just kills and replaces them.

So that's an issue. He's a big faction in the space setting, but he's currently a faction of one character.
He needs some underlings, characters who have similar kinds of powers as him, but no where near as strong that he commands. individually they can't beat him, but as a group he can at least play with them.
He should send them out to new planets as scouts. If anyone from the planet can defeat one of them, then that planet has earned Nyxiontus's attention (something you really don't want) and he pays them a personal visit to see if they can put up a fight, or have the potential to produce someone who can in the future.

So no less than three, no more than seven. That's how many direct powerful underlings he needs to fill the drawpile position as designated powerup jobbers.