Modifiers:
Attractive denizens, of course
Monsters of Deep and Dark in my deepest seas
Hardy Creatures and Fertile World, allowing for an easier and more plentiful lives – and for more war.
Elves and Beastkin are Friendly
Heat-Up but relatively slightly: More revealing fashion and wholesomely sexy, but nothing like ****-world everyone fucking all the time.
Culture shift, gender shift, and aesthetic shift: Individually by race
Dungeons: Most were destroyed in ages past, though there are some great and expansive ones connected to the caverns
Land shift and Flora Shift: individually by regions.

Regions:
The center of human life is the Middle Kingdoms, the broad area up north with China-like geography and, not by coincidence, which has Culture Shift making them a kind of idealized wuxia/xianxia version of ancient China. The region is fed by the Blessed River, whose irrigation is the reason that much of the area is Bright Land, but even the plains beyond the river's reach are fertile and well-watered by lesser rivers. The Blessed River, however, flows from springs and fountains atop the Jade Mountain, which is made entirely of white jade and has since time immemorial been carved with stairs, buttresses, bas-reliefs, and caves in which monks and mystics reside, benefiting from the plentiful mana and profiting from a never-ending stream of pilgrims.
Further down the river, in the middle of the middle kingdoms, the ancient city of Chang'An, once an imperial capitol, sits upon the Lake of Ever-Blessed mana. On holidays, the mana in this lake is so thick that it lies atop the water, where all an enterprising citizen needs is a boat and a ladle to fill buckets of potent potion and contribute to their own prosperity. The prosperity of the city, however, is fought over constantly by noble patricians. There is still an emperor, who lives in the Aureate Manse, but he is politically little more than a prize, brought out and paraded around by whichever noble family can claim oblige him to favor them by force or guile. The city can never exert influence far beyond its walls as long as it is so ridden by conflict, but it seems unlikely that it can be united from within any time soon.

The river splits in Chang'An, and beyond that point splits further. Some forks of the blessed river lose their purity, mixing with the mana of nature and the sea to create lush but dangerous wetlands, populated by fishers and foragers but less united even than the fractious middle kingdoms. The southern fork passes by the portal lands, which are infested both with spatial turbulence and phase beasts, and which connect to the other portal lands on the island in the southeast. That island's most notable feature is a pit to hell, but nonetheless its jungles occasionally attract enterprising alchemists and merchants in search of exotic goods. The blessed river is always busy with the boats of merchants, tourists, and all manner of travelers, but the greatest of them come from the end of this fork of the river, where the Bureau of Eternal Prosperity, a predominantly Infernal merchant association, holds sway in the city that they control thoroughly. Their ships also ply the seas, though they stay close to the coast for fear of losing their profits to the monsters of the deeper sea.

Though this region is predominantly human, it is not exclusively human. Every race has some presence here. Infernals are almost always merchants and seen as little better than criminals, but some are able to find careers where they are respected. Elves and dwarves are seen as exotic, and eagerly accepted as visitors and usually tolerated if they choose to stay. Angels are even better regarded, though rare here as everywhere, and are often given charge of shrines and temples in exchange for donations. Beastkin, on the other hand, are typically enslaved, and have no rights when free. Rabbitkin are the most numerous, as their hair (which they grow much more of due to race shift) is sheared regularly to make the finest clothing for wealthy humans. Other beastkin are used as manual labor or pleasure slaves, though certain markets also enjoy their milk. The region is large and diverse, so of course there are exceptions to these trents. In the forests at the periphery of the region, boarkin and wolfkin tribes roam independent, and the marshes hold a kingdom of Ryu-kin where it is the humans who are the slaves.

Further south, however, the beasts have it better. The highlands among the mountains are nominally dwarven, but most dwarves remain in their mountain holds, and the lands under the sky are worked by goatkin who, by ancient pact, self-govern and only pay food tax. The dwarven holds, too, are all self-governing. Though nominally united, their political unity amounts to little more than a defensive pact. Any joint action other than mutual defense requires the representative of at least two thirds of the holds to agree, and few measures even make it to a vote.
Further south and east is the great jungle. This land is claimed by the elves, who are wiry, brown, and petite creatures that remain youthful their whole lives, and have a *** ration of 80% female and 20% futa. Their aesthetic shift is Amazonian tribal fashion, but they are no less advanced than any other race magically. These jungles are immense (flora shift) with trees redwood-sized or larger, and entire villages rest in the boughs of single trees. Not only elves, but monkeykin, fossakin, coatikin, and similar are widespread, and though the elves see them as inferior, they don't see them as worth oppressing. The tigerkin are a different story. Their Rakshasa kings have palaces hidden with spatial magic, and they hunt elves for sport, just as elves hunt them in turn.
The battles between elves and tigerkin are fiercest around the Jungle Altar, one of the three great altars. It is said that if one person attuned himself to all three, he would be able to reforge the world in his image, but any one also greatly magnifies the power of magical rituals. This one, uniquely, has stairs descending into the ground beneath it which connect to ancient catacombs that subtend a hundreds of kilometers of jungle.
Other points of interest include the rivers, nearly as big as the Blessed River though nowhere near as magical, a great reef, and an area populated by all manner of plant-type monsters who will kill or rape all but the most competent and luck of travelers, forming a potent barrier to trade and communication.

West of the jungle and south of the middle kingdoms is the Iron Wall. This is a wall made of iron, that has stood for centuries at least yet shows no rust and little other blemish. Its sides are smooth and unclimbable without magic, though many of the highest portions, once birdges, have long collapsed and formed passes. At the top, there is a road which has streetlights along either side that still function, turning on instantly when the sun falls 50% below the horizon and turning off just as suddenly when it rises to the same height. Within the wall is desert and mountain. The Mountain Altar and Desert Altar are within this area as well, but are less hotly contested. The mountain altar is difficult even to reach, because of terrain and monsters, and the Desert Altar is fiercely guarded by the Moon-Faced Gnolls, a religious order of hyenakin who are eternally silent yet possess powerful illusion and mind-warping magics. The hyenakin are the majority race of the desert, and the moon-faced gnolls hold that they were once gnolls as well, but were elevated by the strange and copious mana from the great Conduit now surrounded by Dark Lands. As such, they treat gnolls well and slay them no more readily than they slay each other, though life in the desert is harder than the other regions, as little grows there besides great spires of bone. Though hyenakin can break smaller bones and eat the marrow, many of the largest are centuries old and hundreds of meters high, curving like colossal ribs, and are far too large for any teeth to crack. Thus, hyenakin often have little source of food other than raiding the kingdoms along the western coast.
These kingdoms are composed largely of elephantkin, who are 90% male, and infernals, who are 80% futa and 20% male (this percentage unchanged) and who therefore interbreed constantly. These kingdoms are mostly peaceful, treating hyenakin raids as a periodic hazard to ward off rather than true military campaigns, but they have an abiding love of blood-sport, an arena in every major city. Most of the time, shows involve captured monsters or foreigners, but every decade hundreds of elephantkin bulls fight to the death for cash, glory, and demon girl cuddles.

At the other end of the world, far to the north, the only land dominated by angelic folk. Though they're the majority race, that is simply because these lands are not heavily populated by anyone. The northern tundras are windswept, though no snow falls but only countless tiny white feathers, piling up in great drifts. While warm and comfy to snuggle in, the wind atop them is biting cold and there is no food to be found here except for the fish and monsters of the seas. The angelic are race shifted to be perma-loli, and relatively chubby.