Phasms of the Celestial Plane
The default and most plentiful of Phasms reside in the Celestial Plane. It is described as a divine and heavenly realm, with days basked in soft light, and nights blanketed by a gentle mist. Starlight shimmers underfoot with every step, and the ordinarily distant moons and planets turn lazily just overhead,  bobbing in a sea of cosmic dust and winding nebulae.

The Phasms who inhabit this realm come in two varieties, the first of which being the elementally aligned. Working close with specific elements will eventually cause a shift in the physical appearance of a Phasm. Astral is considered the "default," but there are several other elements, including arcane, water, fire, nature, shadow, and so on.

The second variety are the Spirit Guardians, who take up the mantle of mythological heroes and deities, as told by the mortal races. The trade off for becoming a beloved demigod is that one must give up their original sense of self in fulfilling their role.

Phae of the Mortal Plane
The diminutive, fairy-winged Phae have taken to life within the Mortal Realm. It is here that life flourishes, seasons change, reality is governed by the laws of physics, gravity, and the passage of time. Most creatures are born into, and only know of, this realm.

And this is probably why the pixie-like Phae do not quite fit in. Much like folklore involving fairies, the Phae are rather oblivious to mortal affairs, their troubles, their insistence on "aging," and so on. Phae live in the moment and are unconcerned with the future or its consequences - they only want to laugh, play games, eat piles of sweets, and play tricks on mortals.

Thankfully, they are only mischievous at worst - sure, Phae may steal your name, but they'll give it back in a day or two. Until then, you can have their name. Hope you can pronounce "Tangwystl."

Despite living in the Mortal Realm, Phae are rarely seen by mortals, as they often reside in far off lands, deep within enchanted forests and hidden away in the mists. Their kingdoms are small, like the Phae themselves, and are built within the trees and oversized mushrooms. They decorate their little  homes with flowers, fairy lights, and whatever wee knick knacks they "borrow" from mortals.

Phasmares of the Elysian Plane
A realm of stasis and stagnation, the Elysian Plane is where the Phasmares and other devilish creatures reside. The sun is permanently eclipsed by a pitch black moon, allowing only the corona to be visible. It appears as a halo of sinister red light during the day, and fades to a ghostly blue ring at night.

The Elysian Plane is accessible via waygates, which are often extremely subtle (e.g. two unassuming stones, or a dead tree forming an archway.) Mortals who have stumbled into this realm and returned to tell the tale mention a feeling of being turned upside down, and the air is thick and heavy, with a subtle metallic odor.

Phasmares who have taken up a spiritual mantle here are not nearly as benign as their Celestial counterparts. They are cautionary tales made manifest, coming to life as cryptids and prowling the fog-choked forests with baleful intent. Those who do not become malign spirits might instead choose to live alongside other Phasmares or the Strzyga who call this realm their home. Alternatively, they might instead pursue a solitary life in the endless forests, shooing off the occasional roving bands of Blighted Starrobbers.

The only visual difference between Phasms and Phasmares is the mane. A Phasm mane sparkles with starlight, whereas a Mare mane warps the light around it, not unlike a black hole.