I don't have the original fanfic text
this is the only version I could find:

Star Butterfly was experimenting with a new spell from an ancient Mewni tome, but the energy spiraled out of control. The portal tore through the fabric of reality, and she plummeted into the abyss—onto a gore planet, where the very ground breathed agony and hungered for flesh.The red sky throbbed like a ruptured artery, spewing black clouds that writhed like entrails in torment. Star crashed onto the earth, which was no soil at all, but living flesh—warm, slick, veined with tendrils that squirmed beneath her feet, straining to coil around her ankles. Towering all around were trees—gigantic fused veins as thick as sequoia trunks, studded with razor-sharp teeth that chattered hungrily, dripping thick, black ichor. Waterfalls of blood cascaded from cliffs formed of rotting organs, rivers of crimson sludge bubbling with gases of decay, in which chunks of meat still twitched in convulsions.The planet was alive. Everything was alive. The ground heaved with ragged breaths through its pores, oozing pus. The air hummed with moans—billions of voices merged into one endless scream of pain. Star tried to stand, but her foot sank into the soil, and a geyser of blood erupted from the hole, splattering her face. The taste was metallic, salty, laced with rot. She screamed, but her cry drowned in the planet's chorus.Suddenly, a nearby tree stirred to life. The veins swelled, and teeth plunged into her thigh with a crunch, shredding skin. Blood sprayed in an arc, mingling with the nearby waterfall. Star yanked out her wand, desperate to conjure a shield, but the wand... had changed. It had become alive—a writhing intestine that slithered into her mouth, choking her with slime and feces oozing from its tip. The intestine-wand fucked her throat, tearing vocal cords as Star hacked up blood and shit in a frothy mash.The ground beneath her split open like a maw. Tentacles burst forth—thick, pulsating veins with suckers lined in barbs. They wrapped her arms, yanking them apart with the crack of joints. One barb hooked into her eye, gouging it out by the root; the pupil burst like an overripe fruit, spraying vitreous humor.Another tentacle invaded her vagina—not gently, but with a ripping crack, shredding tissue and erupting through her abdomen in a fountain of entrails. It throbbed inside, pumping her full of seed—viscous, black as oil, laced with worms that devoured her from within.Star writhed, but the planet wouldn't let her die. Her body regenerated—slowly, agonizingly, so the pain could stretch on forever. Nearby lay a corpse—a former inhabitant of this world, half-rotted with guts spilling out, yet still jerking. The corpse reanimated: its cock, decayed and ulcerated, stiffened, weeping pus. It lunged at Star, thrusting into her torn vagina with dead meat. Skin sloughed off in flaps, mixing with her blood; worms from its body crawled into her, gnawing at her womb. She felt its seed—cold, necrotic—flood her, triggering spasms that made her expel her own organs.But that was far from all. The planet forced her to eat. From the soil erupted a mouth—a colossal maw with vein-teeth that seized her by the hair and shoved her face into a mound of excrement: mountains of shit mingled with blood, bones, and semen from prior victims. It was alive—a coprophilic monster that slithered into her mouth, nostrils, ears. Star gagged, swallowing feces that burned her esophagus with acid. The monster fucked her anus with its own body—a fat, throbbing lump of shit that ballooned inside, rupturing her intestines. Gases exploded outward, drenching her face in a jet of liquid filth, in which eyeballs and fingers bobbed.The planet itself raped her. The red sky descended, black clouds coalescing into a colossal phallus—clots of blood and flesh the size of a house. It impaled her from above, piercing her skull and bursting through her mouth in a cascade of brain matter and spinal fluid. Simultaneously, blood-falls surged into her body, inflating her to bursting: her belly ruptured, inn