FLASHBACK!
Thunk the Wooly Neanderthal had wandered, lost in the Underworld, after being exiled from his tribe in the frozen hinterlands of Upper Mastadonia. He had seen many strange and terrifying things, and it was a great relief to finally be greeted with hospitality.
He stood outside the Nul Temple. Its facade was carved into the likeness of a massive human figure, 25' tall, seated, with an extensible antenna in the place of its head.

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The door is guarded by two decapitates wearing human-style metal armor and carrying poles with terrible metal blades affixed to one end. A little ways from the door, is a kiosk of some sort. By this kiosk, an acolyte talks excitedly to a slug-man with overactive slime glands. Seeing Thrunk, the acolyte smiles and waves him over.
The slug-man jumps in alarm and the massive, flaxen-furred Wooly Neanderthal comes up behind him. The acolyte gestures to the kiosk and says,
"Please, take of Nul's Gift of Sustenance!" There is a large pitcher of water, mugs, a covered iron pot with a long serving spoon, and a stack of bowls and spoons.
One sniff immediately tells Thunk that whatever is in the pot most definitely did not come from a mastodon. However, the water is eagerly accepted. As he drinks, the acolyte delivers the message of Nul to him and the nervous-looking slug-man.
"Yes, now where was I? Oh, of course... the gift and the glory of Nullity!
"In the Uncounted Years before the Golden Age of the Underworld, Nul did verily coalesce himself from Primal Chaos at the center of the world. Nul strode forth in titanic conquest with sword, plague, and fire and all the Underworld did quake and quell and beg to pay him right and proper obeisance. Nul lorded over his domain for eternity upon eternity to the delight of all creatures, except for the petty jealousies of those pretenders to divinity, the upstart godlings. They were ceaseless in their struggles against the proper ordering of the world, and Great Nul never knew peace.
"After a particularly destructive war with his rivals, Nul collapsed into incapacitating melancholy. All was woe! Vanity! Futility! An eon of ascetic inertia followed, after which Nul ascertained the source of his anguish, suddenly arose, seized his colossal war axe, and in a single sweeping motion, sheared his head from his mighty shoulders. His mind offended him, and so he removed it.
"Nul’s body disposed of his head in a bottomless pit and returned to his throne.
"And who among us has not been offended by their mind? Why should the noble body be enslaved to the callous head? Why should we be troubled with the tangled thoughts and knotted anxieties that are its only bounty? Come, follow me into the temple, and stare into the Abyss—I'll waive the charge for you, as I can see how burdened you are by your troubles—yes, stare into Nul's Abyss, and we guarantee that it will stare back! Relax and let your consciousness flow into oblivion as its eldritch energies bless you with stupefaction!"
The slugman mops his brow with a mucus-soaked handkerchief, and says,
"Ho! Hum! Oh! I... That is, a lovely religion you have here. Nice to see religious diversity and so on. But, uhm, but no. Must continue my rounds, you know. Such a shame. Any other time, I'd love to see more. But I have your pamphlets, Thank you. Goodbye!"
Thunk follows very little of what the acolyte says, but he does pick up on the words "tangled" and "knotted." Perhaps this person is some sort of hairdresser? He had heard that the civilized people of the world had such experts. How lucky he is to have found one! Could this small person help him with the problems that have plagued his magnificent coiffure? After thinking hard about the offer as he understands it, he asks the acolyte,
"You maybe take a little off the top?"
The acolyte's face blossom's into a delighted smile, as though he can't believe the gift Thunk has just offered him.
"Why, yes, yes of course! I see you are a truly worshipful soul and wish to embrace the fullest gifts of the Mindless God and join the ranks of His most favored and blessed disciples, the Holy Headless, who have made themselves new in the image of Nul! Please! Come with me! Right this way!"
Ten minutes later, Thunk was anesthetized and laid out on an operating table.