My original self used the Everdawn Pool to create me.

Simulacra with magical abilities are supposed to impossible. If they weren't every archmage would have a hundred copies of themself. This sounds like an artifact.

What is the Everdawn Pool?

An extremely powerful artifact from Thassilon. It's a huge pool of magical blood.

Of course. Why is it always Thassilon. Did the Runelords create sealed evils every other day just so they could cause her problems now? It sure feels like it.

Where are your original self and the Everdawn Pool located?

Both are in the Sunken Queen. A reinforced magical Thassilonian bunker that survived Earthfall.

Where is the Sunken Queen and what defenses does it possess?

The Sunken Queen is in the southeastern Mushfens. It's nearly indestructible. All of the walls are warded against harm. They're under ghost touch and impenetrable to ethereal travel. You can't teleport in or out without first attuning to the Everdawn Pool. Boggard champions and powerful devils and aberrations and magical beasts guard the place.

Why that combination of things. Who in their right mind uses boggards as guards? What does she even mean by 'boggard champions'? Are they a subspecies?

Is there anything else you believe someone who wishes to safely traverse the Sunken Queen should be aware of?

Some of the structure is submerged underwater. The main entrance is an submerged staircase. The Everdawn Pool is on the fourth level at the top of the structure. There is nothing else I am aware of.

Right. That's probably all she needs. She can come back for the false Ileosa and the devils and the shining children later.

Greater teleport.

There was once a city.

In those days, there was nothing but the city, which stretched as far as the eye could see and then further then that. Its light shined and shined and crossed the stars. Everywhere from Aballon to Aucturn had felt its influence. Nothing had ever been as great as what Xin had built. Nothing will ever be as great again. Even all together, the peoples of the world today could barely hope to fill even one of its domains. 

All that remains now is a swamp and a crumbling tomb.

She appears floating in the air.

Surrounded by a grove of primeval mangroves and draped in sheets of moss and vines, the immense horns that top the Sunken Queen seem to claw at the sky like the talons of an gargantuan monster drowned in an abyss of mud. On the east side of the pyramid, which leans heavily into the marshy slough, one of the three original horns has collapsed, leaving a jagged, metallic stump. On the south side, barely dented by the elements and millennia of neglect, is a giant relief of a standing, naked woman, her lean, idealized figure immersed in murky water up to the knees.

Felandriel casts more buffs. Ice body to deal with the water and grant her immunity to almost everything except fire. Greater invisibility so she can be hostile without issue. Haste to travel faster. Her extended incorporeality is over halfway expended.

She flies under the water and into the Sunken Queen.

Ileosa Arabasti is submerged within the Everdawn Pool. She is practically omniscient within the Sunken Queen. An infinite number of clairaudience/clairvoyance sensors that all have true seeing grant her total and perfect awarene—

Mind blank.

Ileosa does not notice when Felandriel enters the Sunken Queen.

A set of stairs descends to a submerged hall. Near the bottom, the tilted stairway drops into a horizontal layer of silt. The walls and the four massive pillars supporting the ceiling are decorated with hundreds of stylized images of the same beautiful woman carved onto the pyramid’s face.

She flies at great speed down the stairway.

An enourmous devilfish is suspended in the water.

That would be one of the beasts. She zooms past it.

Beriawash does not notice her.

A fifteen-foot-diameter crystal globe hangs between two square pillars in this room, connected to them by thousands of glittering crystalline filaments. A crystal tube extends up from the eastern side of the sphere through a hole in the ceiling. Inside the sphere is a staggering amount of treasure: coins, gems, art objects, rolled-up tapestries, bars of precious metal, and more.

That's probably a deadly trap. Or an illusion. Felandriel will come back for it later. She flies upward to the second level.

The northwestern portion of the sloping flagstone floor of this chamber has been fitted with a crude horizontal wooden platform. On the platform are nine filthy straw mats, leather bags, and fishing rods.