Ben 10: Ultraverse X

Story
After 20 years being a hero, Ben 10 has faced many dangers throughout the cosmos and met new allies. However, Ben has not unlocked the remaining 500,900 aliens, he said that naming them would be a waste of a time, so he then reflect on how being a hero for 20 years isn't that easy so days passed on when Ben went on a mission on Planet Hathor. Home to the Splixson, he fought stopped vilgax for attacking the splixsons. Ben asked why did he chooses to attacked the Splixsons, Vilgax replied "long ago there was an ancient race, older than the universe. There was the race called the Mokudans, they're located near planet Hathor, I was finding the strongest person in the universe, and I will kill his allies and the cities of his world, but he then annihilated me and stood upon me and crushed me into the ground and used all his energy to defeat me, but afterwards, he died due to how intense his power was, i fear that the race is so powerful that it makes celestialsapiens the 1 trillionth". Ben tried to ask vilgax more questions then and he said to vilgax " if he died the time you fought him, why did you tried to find him again" Ben was confused. "There was actually a Mokudan that surpassed the limit of what an average Mokudan has gone through, I am willing to find him to inject the DNA, once that DNA injected to my body, I am fully immortalized" Vilgax told his story from calm to aggressive. Ben immediately find all the clues as where the mysterious race is from, but a splixson elder came towards Ben and gives him more information on the existence of planet tsurufu, home of the Mokudans, it is said that their power rival to that of the Saiyans and native creatures lived on that planet are in fact so dangerous that they can easily destroy the entire universe, Ben called Rook and asked whether the Plumbers can create a suit to withstand the creatures living on Planet Tsurufu. A few moments later... "So this planet is actually the home to the mysterious race? I thought the planet was destroyed" Rook said to Ben in confusion. Ben replied "it was destroyed but I'm sure that a few living out there" Ben traveled the solar system and seen that the planet is not there. So Ben travelled the cosmos and keep searching for the remaining race but unfortunately can't find them. Ben was feeling hopeless as he can't find the missing aliens. Rook said to Ben that he should have done before finding them throughout the universe. "Ben, if the aliens aren't in all of the planets that you can find, why not your own planet" Ben said "I should have done that before..." Ben and Rook head back to earth and fortunately found the one that he was looking for. Ben head towards the Mokudan and talked to him. He said" you must be Ben 10, one of the strongest heroes I heard about. I met Goku which is the strongest and I can't believed you actually here, I'm Ultranus, and this guy is Omnaple. He's kinda..." "Yeah we get it, look an elder of one of your solar inhabitants said that your planet was destroyed was that true? Ben stopped Ultranus of bringing out more details about himself and asked about his race instead. "I don't Know ask Omnaple, he knows it" Omnaple go towards Ben and said in an edgy manner "you don't look strong as I expected even with your toy" "look is there any details regarding to your species? Omnaple replied yes and then give more info regarding the species. "Our Civilasation was once a marvel of the universe. It is the most Advanced and the Oldest, but my father and race died due to that bastard....." Ben asked "who was this person you refering to"