Prison Mirror

 

Look**** 

Its four not three. 

Hearts Fury 

"Fury's Heart was a Fiendish plane in the World Tree cosmology model.[3] It was the home plane of the Gods of Fury, Auril, Malar, Talos, and Umberlee[4][5] until the Spellplague scrambled the cosmos. In the wake of that world-shaping event, it merged with the House of Nature to form the Deep Wilds,[6] except for Talos's portion, which the aspect of Gruumsh[7] took with him to Nishrek" 

... "At first glance, this plane was similar to the Barrens of Doom and Despair, with vast stretches of desolation and weather extremes, but unlike the Barrens, this plane was teeming with life that fought tooth and claw for survival. Except for Malar's realm, the whole plane was buffeted by violent storms, thunder and lightning, blizzards of rain, sleet, and snow, and hurricanes. Wind speeds rarely dropped below 31 mph (50 kph) as the Gods of Fury lashed the land and the inhabitants without mercy. In the Land of the Hunt, Malar moderated the weather somewhat to enable tracking skills, scent, spore, vision, and hearing to be more effective, enhancing the thrill of pursuit." 

Auril - Winter's Hall 

https://forgottenrealms.fandom.com/wiki/Winter%27s_Hall 

Rumors & Legends

Winter's Hall was rumored to be the true source of the Styx. According to the legend, a mix of melting snow, divine poison and the blood of a tortured deity flowed into Pandemonium and became infused with the plane's evil.[11]

On the back end in way depthy research it's possible Ilsensine can "drink" from it. But it's likely that this may or may not be the origin of that entity. The other entity it could be is Lady of Pain but in that case been made clear they will never tell us either way. These are "dead ends". << Wait. Isn't that kind of telling in and of itself? 

The trail goes cold.  Oh. Yea, we're talkin' about the ice queen.

Realms

Auril's realm of Winter's Hall was the coldest place in all the planes. Her throne was made of blue flames, frozen in place and shaped to her liking. Her palace was constructed of bitterly cold wind walls.[1]

Malar's Land of the Hunt was a vast open plain kept well stocked with game for sport. Intruders were very likely to become the next quarry.[4]

Talos kept the winds constantly blowing outward from his Towers of Ruin; the raging hurricane at the center gradually died down to mere strong gusts at the borders. The Storm Lord's "palace" was mainly rubble haphazardly stacked into "towers" etched by the wind and subject to random and frequent lightning strikes. At his whim, pelting rain and targeted lightning bolts joined the storm to drive off unwelcome guests.[10]

Umberlee swam in her reddish salt-water sea beneath foamy waves churned by constant storms of pounding rain, gale-force winds, and lightning—near-certain destruction for anything that attempted to breach the surface or brave the waves.[10]

Prime Material plane • Cynosure • Fugue Plane

Transitive Planes: Astral Plane • Ethereal plane • Plane of Shadow • Spirit World

Celestial Outer Planes: Arvandor • Brightwater • Dwarfhome • Dweomerheart • Gates of the Moon • Golden Hills • Green Fields • House of Knowledge • House of the Triad

Fiendish Outer Planes: Abyss (Layers) • Barrens of Doom and Despair • Blood Rift • Clangor • Deep Caverns • Demonweb Pits • Fated Depths • Fury's Heart • Hammergrim • Nine Hells • Nishrek • Supreme Throne

Neutral Outer Planes: Dragon Eyrie • Heliopolis • House of Nature • Jotunheim • Warrior's Rest

Inner Planes: Elemental Plane of Air • Elemental Plane of Earth • Elemental Plane of Fire • Elemental Plane of Water • Positive Energy plane • Negative Energy plane

Planar Pathways: Infinite Staircase • River of Blood • World Tree

Far Realm

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What is the feywild in cannon editions? When does it "show" and what editions does it "start in"? 

Answers: 4e

Parallel Planes

Parallel planes were planes of existence which existed in parallel with the Prime Material Plane. They were defined by a shared geography, bestiary, and were more easily reached than other planes by inhabitants of the Prime. The parallel planes were created in the days of creation when the Primordials, mighty beings on par with the gods, split the Prime into three parts, finding some parts "too bright" or "too dark."[1]

The two parallel planes created were the Plane of Shadow and the Feywild, although the Plane of Shadow later transformed into the Shadowfell.[2]

What is Prismeer? A Prison Mirror perhaps.

Prismeer was a Domain of Delight found in the parallel plane known as the Feywild. It was created and ruled by the archfey Zybilna, an alias of the Oerthian archmage Tasha.

What does this tell us?

It's host is somewhere else. The feywild is only a mirror of what actually is. It's not reality, it's only a mirror of what is hosted on a material plane. That plane considering the statblock is labeled "Iggwilv" not Tasha or Zybilna actually --> is hosted in the Abyss, Hades or Greyhawk. 

Three Carnivals in Cannon? 

Yes! 

2e Oerth, Castle Zagyg 

4e Guide to Ravenloft 

5e Witchlight 

Which editions feature games with mirrors in that that link back to the Land of Mirrors in cannon?
 2e Carnival. 4e Demonweb Pits. 5e Witchlight. 

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Spire at the center? The Castle? The vine growth?

Its probably vines from Gaheena. Considering the "outside of the scope of this campaign" in Witchlight tells the DM that hags return to a towner in Gaheena and "this is where you can hunt for them if you want to level up the end game as an option. It's forces of alliance? Yugoloths.

https://forgottenrealms.fandom.com/wiki/Bloodthorn < found on Hearts Fury also

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Bhaur

https://forgottenrealms.fandom.com/wiki/Bheur 

Found in the Deep Wilds. (the Wold Axis cosmology rather, another edition of dnd) 

"The Deep Wilds was a plane in the Astral Sea in the World Axis cosmology model. The Deep Wilds were formed in the wake of the Spellplague, being a merging of Fury's Heart and the House of Nature. The Deep Wilds were home to a variety of nature deities including Silvanus, Mielikki, Auril, Malar and Umberlee. Silvanus ruled the plane as a whole and the other deities who dwelled in the Deep Wilds served him.

Realms

Blood Sea, the domain of Umberlee that was wracked constantly by gale force winds.

Land of the Hunt, the domain of Malar.

Land Under Eternal Ice, the domain of Auril and reputedly the coldest place in any plane of existence.

Summeroak, the domain of Silvanus. It laid deep within the heart of a vast woodland of mighty trees." 

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^ One of those gods is Miklikki 

https://forgottenrealms.fandom.com/wiki/Mielikki 

Linked to https://forgottenrealms.fandom.com/wiki/Lurue God of Unicorns. Miklikki is the "rider" of the "unicorn" in this cosmology as a cosmic power force that carries through unicorn and honors elven lore at large. Without knowledge or a lot of interested in what people believe about unicorn fantasy this goes missed... 

"Lurue (pronounced: /ləˈruː/ luh-RUE[1]), also known as Silverymoon,[2] was a Faerûnian goddess[7] of intelligent and talking beasts.[1] The Queen of Talking Beasts was worshiped not only by unicorns, but various other sentient, non-humanoid creatures, ranging from entire species like pegasi to individuals within species that gained the ability to communicate. The Unicorn Queen was also revered by romantic and swashbuckling adventurers..."

Oli was a Cleric of this entity. 

So her going back to the unicorns was not an accident, it was an act of faith. 

Don't you think her god would have acted for her in the story? Especially after getting the unicorn horn, saving the unicorn, etc?

 Unicorn Horn 

https://ravenloft.fandom.com/wiki/Isolde is a Ghael eladrin who was memory wiped by "Zybilna" just like the characters (we were warned) 

Spider on the shoulder, striped, unicorn horn. 

Lurue is the god of unicorns and beasts, good aspect of the weave. We want Lurue to keep her weapon because without it winter would come forever. 

What do I see in this image? a potential trap. Lolth on the shoulder of a character that looks like the character in previous editions that got memory wiped by a carnival fey named Zybilna. This character in the image is holding an alicorn. ... they don't look happy... 

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It's a spider entity. Lolth ruled or linked. Demonweb pits 101.