There are few bears left in the forest of Lin. But the She-Bear has been there longer than any man remembers. Her territory is on the western outskirts of the central mountain range.
She is enormous, leaving her claw marks on the highest trunks. Each of her droppings could fill an oxcart. Her urine gathers in fetid pools before subsiding into the earth. Her roar is deafening and her wrath cataclysmic. Great tufts of her red-brown fur can be found throughout her territory, caught in the branches or lying in clumps along the trailside. Her footprints become ponds or flower meads.
In the winter, she withdraws into a great cave to slumber. As she slumbers, She dreams. A curtain of mist draws around Her territory. The lands within become strange and surreal.
The nature of Her dreams will alter them.
If she is at peace, she will simply dream of her mountain slopes in winter, deep snows blanketing the familiar trails under the half-light of a slate-gray sky. But her memories may wander into summer, and you'll round a bend to find yourself blinking up at green leaves and bright skies. Cubs play in the sunlit groves and must be avoided at all costs.
If the Bear dreams of her infancy, the snow vanishes. The air remains chilled, but the mountain's slopes are warm, almost hot, and covered with soft fur. The sky becomes a distant cave roof, and the trees are enormous stalactites. They are cold, slightly damp, and rough to the touch. The light is dim but never fully dark, as though snowy light is filtering through some unseen opening. Around the den, steaming milk will gather in stone-lined pools. This is the Dream Milk, which so many expeditions attempt to bring back to the real world.
If the Bear hungers, enormous and succulent fruits grow on leafless trees and lie in piles amid the snow. Mushrooms spring up in scattered patches, and rich tubers poke up through the turf. Rivers of sweet things, syrups and sorghums and molasses, flow in impossible uphill courses. Cartoonishly fat cattle with swollen limbs and bellies amble about. Fish plop out of streams and wriggle on the banks. The cliffs are dotted with the hives of enormous bees, dripping with honey.
If the Bear lusts, the climate shifts to resemble late spring. There are flowers everywhere. Great he-bears stalk around the mouth of the den, awaiting her call. Sometimes they spar with each other in titanic combat. Her cadre of old lovers include bears long extinct, legends long forgotten. They are fit and strong and very much opposed to your presence. Mercifully these memories are from her youth, so the brutes conjured up are of a large but not impossible size for bears. Their deaths (or yours) will not bother Her at all, but the den itself must not be entered.
If she is restless or uneasy, the sky will darken and a bracing wind sends curling serpents of fog to wind through the trees. Shadows move on the edge of sight and strange noises sporadically puncture the deep silence. Although no outright attacks occur, you are constantly on edge. Sleep is difficult and the strain on your nerves intense.
There are few things the Bear truly fears anymore. But, reaching back in her memories, her nightmares will conjure the Hunters, faceless humanoids (and stranger shapes still) in furry rags. They wield flint spears and shoot flaming arrows. Cruel traps will be hidden along the trails. Enormous packs of slavering wolves will haunt the slopes. Forest fires will rage, rivers will flood. The wail of cubs, lost or in pain, will echo incessantly over everything.
So why go there?
The dreamscapes themselves and the things dreamed in them disappear when the Bear shifts moods or wakes. But dreamed things taken by outsiders will persist through the shifts and will gain permanence if brought out of the Bear's territory and into reality. (This must be done by outside intervention. Creatures or objects within the dreamscape cannot and will not leave of their own accord.)
Despite the great danger, expeditions are made every winter. Both furs and food are vital in the winter months and can be had here in abundance. Dream milk will never spoil, and it promotes health, fertility, and wisdom. Drinking it also prevents nightmares, something particularly helpful during the full moon. Prolonged usage causes hair and nails to grow at double the rate. The honey also has an energizing effect and may boost speech, charisma, and intellect.
The risks entailed in gathering these things is high. Even beyond the dangers of the terrain and the strange logic of the dreamworld, the resources also attract scavenging parties from the great apes who dwell in the central highlands. These often prove formidable. Their mental powers allow them to predict the Bear's next mood and, roughly, the amount of time until the next shift. Their camp also functions as a mobile pocket of base reality within the dreamworld.
While for years she has had to make due with mouthfuls, the rise of the Swine God and his brood has finally given her prey of a size commensurate to her appetite. She has been slowly extending her territory toward their rutting grounds, inevitably bringing her close to the foresters' encampments.
[Inspired by noisms' Behind Gently Smiling Jaws setting.]