HIGHLANDER'S REALM ("D&D" FORUM RPG)

Leara grabs the three sticks of incense not used for the ritual and bags them.

After Leara and Aldus leave, Aldus shuts the door and goes outside to the battlement. The only windows are from the outside, and they are made of a dark stained-glass. They're too high to see into clearly, but you can see the mirror.

Agnelia lights the incense and the room begins to fill with the powerful scent of lilac and blood. She unwraps the mirror and folds the cloth and wrappings. The mirror begins to swirl with mist as Agnelia sits on the pillow and inhales the incense deeply. She immediately goes numb in all parts of her body and only mental discipline ensures that she retains her deep breathing and eye-contact with the mirror. After half an hour the the mist in the mirror begins to poor out and surround Agnelia. Parts of the mist begin to take the shape of fellow acolytes of the temple. When the mist is completely emptied from the mirror, the backside of a female Drow appears. The Drow is hunched over many papers and reading by candlelight. Almost in surprise, she turns around and looks directly into Agnelia's eyes.
"Oh, it's Agnelia! What are your troubles this time?"

A blue ball of light forms in front of Aldus and transforms into a ball-shaped creature with four long, slender wings. It has one eye.

It's an Azaeta Seul, a minor angel. It's small and can carry any creature as long as it's within 1 size category of it (Size categories go: Diminutive-Tiny-Small-Medium-Large-Huge-Colossal)

It also can see invisible creatures and create a burst of daylight once per day that blinds all creatures withing 30 feet of it, and confuses all creatures within 60 feet of it. A constitution save would negate the effect.

The windows are dark and make the room even more dim, and the room is filled with a thick mist. You see Agnelia looking into the mirror, but the mirror is placed so that you cannot get a good look at it from any of the windows.


The Drow listens and wait a few moments before giving her reply.
"Typical hasty surface dwellers... well, you did have the dream, right? Could you not make sense of it?"

"Yes, the planes walker. He's an enemy of Viria's plan to get back at the original souls for deserting her."
When you hear 'original souls' Agnelia immediately knows she is talking about Carthiser, Harmonia, Dissidius, and Deisk and what each of these gods do/have done as per the lore in the OP, except that Dissidius actively tries to remove Viria from his realm, Harmonia and Deisk attempt to capture her, and Carthiser would destroy her without a second thought.
"In short, he can travel between the realms of the original souls as freely as you could walk across land. Usually it's very difficult to cross the barriers between the realms. Now, you want the dream again? Very well..."
the Drow begins chanting and waving her arms and fingers in a hypnotic motion. Agnelia's vision blurs as she goes into a dream-like trance.

The Beyond. An infinite place of pure chaos, where energies are so thick they're visible as colors, and great serpentine beings roam about, reveling in the colors. Proteans.
The Planes-walker appears, robed and hooded in plain brown robes. Hate.
Hate him.
Hate him with all your being.
His soul is eternal. Souls shouldn't be eternal. Destroy his soul! Beware.
The beast appears into vision, it looks like a protean but it is bound by darkness. It is putrid smelling and it's three-pronged maw oozes acidic saliva. It serves the plane walker. It is dangerous. Kill it only when you are ready.

Afterwards Agnelia's vision is restored and she looks at the Drow who asks
"Do you need more guidance?"

author=pianotm
If this remains true for the Highlander's Realm, how can this mirror survive next to a window?)

The windows are extremely tinted.

And when I say he "Saw Agnelia" I was merely stating what was the most likely thing he actually did see. It was more of a drowned out figure.