I own nothing from the Ben 10 franchise, nor do I claim to. Null Guardians can contract diseases that only indigenous Earth based lifeforms are documented to suffer from. Because...uh. I'll think up an excuse for why this is probably canon sooner or later. In the meanwhile, just go with it.
D'Void pranced merrily about as he observed his slaves toiling away at his evil drill slash furnace combo within the desolate Null Void. A strange sight happened to ruin his uncharacteristically lighthearted, effeminate mood quite suddenly.
"AAAAH, MY MASTURBATING HAND!" screamed one of the slaves. He held his profusely bleeding wrist stump.
"You should have been mining in the mines instead of jacking off," D'Void giggled at the unfortunate slave.
The slave used his remaining hand to make a come hither motion. Out of sheer curiosity, D'Void approached. He leaned down. The slave whispered into his ear with his dying breath.
"Your terrible and annoying Mary Sue has Plot Convenient Super AIDS Instant Death Cancer now," he whispered with his last breath before he died of death. He died of shock from loss of blood. And to further the already incoherent plot.
D'Void gasped. "Not my Mary Sue! I mean, my totally original character love interest that's been quite sneakily disguise attempted as a freakish animal baby, but it still counts because its only purpose of existence is to garner attention, fuel a multitude of fetishes, warp me and various other characters massively out of character, and generally be an annoyingly unique and hideously cute ultra special snowflake, and it receives generous amounts of unfounded special treatment every waking moment, as is custom of Sue kind! By the way, what the heck do you idiots not get about the words NIGH INVULNERABLE? Like the worst we could both get would be stubbed toe or massive headache. We're both God-Tier fucking Black Hole Sues!"
"Fuck...youuuu," the slave spoke with his true last dying breath while giving one last middle finger. And a thumb down for good measure. Then he died. And when you die, you shit your pants. Sorry, I don't make the confirmed rules of biology. Deal with it.
"Ew, gross!" D'Void cried out. He recoiled instantly. He then ran back to his citadel to check on his horrifically irritating yet beloved baby!Sue. "My baby! Where is my baby?"
He found her devouring a bowl of Fruity Pebbles. And by devouring a bowl, I mean the entire bowl. In her mouth. Swallowed whole. D'Void picked her up. He snuggled her tightly. It's so disgustingly adorable. ISN'T IT? You had better agree, simple minded plebe, or I shall write ten thousand more similar stories to encourage this mindset. Eh, I'll probably do it anyway. I am a huge and shameless attention whore. Worship me for the genius writing skills I am heavily deluded into thinking I possess, but do not actually possess in any way.
"My poor baby. No one is going to taint you with Plot Convenient Super AIDS Instant Death Cancer," he cooed to her. He looked into her face. He gasped.
She had contracted Ultra Gonorrhea.
"At least he lied about the Super AIDS Cancer," D'Void sobbed before falling victim to the disease himself. "But this is so much worse."
They both died. Tragically.
Be sad. So I can rub one off to your tears of misery.
The END