I claim no ownership of anything belonging to the Ben 10 franchise. I have to ignore important plot details, or my elaborately handcrafted delusional fantasy falls apart, you know.
It was a regular day within the Null Void. D'Void was hanging out near his giant mega interdimensional-drill-furnace-hole digging equipment, preparing to be quite evil and conquer the planet Earth. Little did he realize that upon tearing a full hole through the Null Void into the realm of Earth, he would completely destabilize and eventually collapse both dimensions. And then there would be no Mortal Kombat tournament that century, and everyone would be sad. And dead.
Poor D'Void was much too concerned with his annoying ever-present little creature-baby-thing. Not exactly Logic Destroyer in this continuum. We'll dub this one: Screamy-Sobby-Boo-Boo. Or SSBB, for short.
"Not now, SSBB, Daddy has to rip apart dimensions without properly calculating for resulting physics imploding consequences," D'Void said tiredly. "Could you please stop shrieking for five minutes so I could hear myself thing? It's like a power drill made of pure hatred boring into my brain."
SSBB shrieked hysterically and vomited onto his foot.
"Maybe I did account for dimensional collapse...but maybe I also didn't bother to care because I'm tired of living and want to take both worlds with me. I'm an asshole like that. When properly characterized, that is," D'Void muttered before jumping onto one of his many Null Guardian mounts and quickly flying off through the opening portal.
He watched contentedly as it closed, leaving his hysterically sobbing baby-creature behind.
"Oh, glorious fifteen seconds of freedom!" D'Void cried.
Eventually the Earth exploded, along with the entire dimension the Earth-based main universe was located within. It caused a chain reaction that destroyed several more continuities in the omniverse. The writers were too tired to repair the continuity gaps, so they just retconned it all out of existence and ignored questions from angry fans who's childhoods were now ruined by jarring dramatic changes.
(The End)