Eryslai is more commonly referred to as the Plane of Air, not to be confused with the Plane of Sky. Eryslai is the dominion of Xegony, the Queen of Air and it is perched high above the material and astral worlds in the clouds of the ether. It is a collection of majestic islands that represent Xegony's idyllic beauty. The Plane of Air is a wonderous place of beauty and peacefulness, until adventurers from Norrath arrive. For all its beauty, Eryslai is just as mysterious. The keys to unlocking its secrets are hidden well and held by powerful creatures with immeasurable knowledge of the arcane arts.
Bodiless suits of armor are trained to defend the realm if such an invasion comes, but Xegony strives to remove the taint of warfare from the lesser planes and the mortal worlds as well. The four primary islands of the plane are each places of worship and study, not just for the natural inhabitants, but for a rare select few who have been chosen by Xegony herself to learn from the wealth of knowledge and power she holds. Each castle on these four islands is governed by an avatar created by Xegony herself. These avatars (Dust, Mist, Smoke, Wind) are powerful beyond the comprehension of even some deities, and each holds a piece of a key required to reach the highest island, that of the Queen of Air herself.
On a journey up the various winding halls and islands, adventurers will be tested by all types of avian creatures and air elementals. At the highest reaches of the plane is a small island of almost invisible spiders. In the center is a small rainbow, which works a teleporter to Xegony's island, which is unimaginably higher into the cosmos. She manifests herself as a towering Elf-like woman more beautiful than any witnessed by mortal eyes. The wings that extend from her back are much like a butterfly, with hues of blue and green swirling throughout. She wears a translucent purple gown and wields a wand of immense elemental power. Despite her aversion to war, she does not tolerate mortal visitors, and will defend herself by crippling her attacker's attack speed and eliminating their ability to use various skills they've learned. Xegony will also randomly summon the aid of her many creations, regardless of how thoroughly an army has cleared her plane.