D&D 5E (2024) Feywild technically doesn't mention the Seelie and Unseelie Court

[Charlaquin]

In Scottish folkbelief, the "unseelie" associate with fiends and undead, whence the Shadowfell court of the Raven Queen has some coherence.

Relatedly, Fey Crossings between the Feywild and the Celestial dominions, especially Arvandor, make sense. In parallel there be Shadow Crossings between the Shadowfell and the Fiend dominions, especially Hades.

In this way, Celestials often travel to the Material Plane via the Feywild, and Fiends via the Shadowfell. Hence, Fiends are sometimes present in the unseelie court gatherings along with Undead.

I like to treat the Feywild as very much like Pangea in the Neolithic Dark Era for Werewolf the Forsaken (shoutout to my nWoDCofD homies!) - a transitory plane that bridges the gap between the Material plane and the various Outer planes, where the features of the Material plane are reflected and exaggerated according to their sympathetic proximity to the Otherworlds it bridges the gap to.

 

[Yaarel]

I like to treat the Feywild as very much like Pangea in the Neolithic Dark Era for Werewolf the Forsaken (shoutout to my nWoDCofD homies!) - a transitory plane that bridges the gap between the Material plane and the various Outer planes, where the features of the Material plane are reflected and exaggerated according to their sympathetic proximity to the Otherworlds it bridges the gap to.

I think this makes sense for the 5e cosmology as well.

Because Humanoids have "souls", it is possible to enter the thoughtstuff of the Astral Plane, and from there the Celestial and Fiend dominions within it. But it is also possible to physically walk from the Material Plane to the Celestial and Fiend planes, via naturally forming Fey and Shadow Crossings. These crossings translate the physical body into the new planar environment − and sometimes the journeyers dont even realize they entered a new plane of existence.

The areas around a crossing exhibit aspects of both planes that are bridging. In 5e, the High Elf culture intentionally inhabit Fey Crossings with the Material Plane, and are especially Fey compared to the Material Plane, and especially Material compared to the Fey Plane.

 

[Charlaquin]

I think this makes sense for the 5e cosmology as well.

Because Humanoids have "souls", it is possible to enter the thoughtstuff of the Astral Plane, and from there the Celestial and Fiend dominions within it. But it is also possible to physically walk from the Material Plane to the Celestial and Fiend planes, via naturally forming Fey and Shadow Crossings. These crossings translate the physical body into the new planar environment − and sometimes the journeyers dont even realize they entered a new plane of existence.

The areas around a crossing exhibit aspects of both planes that are bridging. In 5e, the High Elf culture intentionally inhabit Fey Crossings with the Material Plane, and are especially Fey compared to the Material Plane, and especially Material compared to the Fey Plane.

Yes! Someone gets it!!