The duty to live

[Anastasia]

How close are you getting each round?

[Ebiris]

Using space compression to get 3600 feet closer per round. So at two miles that's 3 rounds to get there.

[Anastasia]

After the first step forward, your keen eyes notice little slits in the walls opening up. Subtle but notable.

[Ebiris]

Any magic around us I can see with arcane sight (or greater arcane sight in Marie's case)?

[Anastasia]

Yes, you can now detect powerful evocation from those slits. Overcharged desiccation magic that'll drain the water and life from anyone within it through thirsty dust.

[Ebiris]

The slits should be well out of arcane sight range since we're like 7000 feet away, was more checking if there was some kind of magic where we currently are that's detecting us.

[Anastasia]

Oh, that's a dumb DM way to misread something. Not that you notice.

[Ebiris]

"Someone there has god-like eyes," Alicia says when their strange space-twisting approach draws a reaction. She doesn't know what's going to shoot out of those slits but they're too far away to do much right now anyway. The next space-twist only brings them 2000 feet closer, the one after that the same, then she uses the extra range afforded to put their next step directly above the top of the building rather than approaching it from the side.

Assuming nothing exciting happens in the interim.

[Anastasia]

'Unsurprising,' Antenora responds, 'Demogorgon has not staffed this with only feeble demons.'

Your tactic seems to work - you blink atop it undisturbed, no attack launched your way.

[Ebiris]

"Attacking now - Marie, interdict the area," Alicia demands as things begin to happen! First a beam of silver fire slices a hole in the roof for them to enter, while Marie's illusory copy casts Jaela's teleport block and then begins to sing an energetic and stirring song about nothing standing in their way! Everyone within a mile can hear her song, they're not being subtle right now.

1800 foot radius teleport block around Marie, then inspire greatness.
That's 5 bonus d10 hd (maxed because we're all gods, add the con mod as well), +5 competence attack, +4 competence fort.

Spoiler: ShowHide

Alicia HP: 956+20/956
Active spells: Many moments of prescience (CL 38), extended mind blank (CL 39), extended nondetection (CL 39), greater heroism (CL 36), extended ray deflection (CL 39), epic mage armour (CL 36), sensual blessing (CL 36), foresight (CL 36), keen edge (CL 36 on sword), dance of the unicorn (CL 36), extended greater anticipate teleportation (CL 38), repelling shield (CL 38), freedom of movement (CL 36), greater visage of the deity (CL 36), recitation (CL 36), true seeing (CL 36), death ward (CL 36), sublime revelry (CL 36), opal protection (CL 38)
Defences: AC 85, CMD 114, spell resistance 51, energy immunity (fire, cold, negative energy), status immunity (polymorph, petrification, disease, poison, stunning, sleep, paralysis, death effects, disintegration, energy drain, ability damage, ability drain, mind-affecting, and fear), nondetection (DC 54), freedom of movement
Stat buffs/penalties: +4 morale attack/skills/saves, +10 armour AC, +25 competence perception, +2 insight AC/ref, +4 str, +2 dex, +4 con, +2 int, +4 wis, +4 cha, +1 natural armour AC, +9 shield AC, +3 luck AC/attack/saves, +3 morale AC,  +5 bonus hd, +5 competence attack, +4 competence fort
Perceptions: Arcane sight, true seeing, 5 mile tremorsense/blindsight/scent perception +87
Sorcerer spell slots: 6/16/16/14/9/9/15/9/9/5/8/5/7/7/6/4
Duskblade spell slots: 6/23/22/23/11/7/16

Marie HP: 830+20/830
Active spells: Many moments of prescience (CL 38), extended mind blank (CL 36), extended nondetection (CL 36), greater heroism (CL 36), greater arcane sight (CL 36), epic mage armour (CL 36), sensual blessing (CL 36), repelling shield (CL 36), freedom of movement (CL 36), recitation (CL 36), true seeing (CL 36), bibliotheca arcana (CL 36), death ward (CL 36), sublime revelry (CL 36), opal protection (CL 38), superior invisibility (CL 41), project image (CL 41)
Defences: AC 98, CMD 97, spell resistance 51, energy immunity (electricity, fire, sonic, negative energy), status immunity (polymorph, petrification, disease, poison, stunning, sleep, paralysis, death effects, disintegration, energy drain, ability damage, ability drain, mind-affecting, and fear), nondetection (DC 51), freedom of movement
Stat buffs/penalties: +4 morale attack/skills/saves, +25 competence perception, +9 shield AC, +3 luck AC/attack/saves, +15 insight knowledge, +3 morale AC, +5 bonus hd, +5 competence attack, +4 competence fort
Perceptions: Greater arcane sight, true seeing, 1 mile tremorsense/blindsight/scent perception +81
Sorcerer spell slots: 6/10/10/8/8/9/9/7/7/8/7/5/6/7/4

[Anastasia]

The roof opens up. Immediately there is a burst of air and wind out, a buffeting that would knock lesser beings back. But you hold your ground as it opens up into what looks to be a laboratory of some kind - potion vials are about, as well as runic circles, tomes and other such things.

[Ebiris]

Any magic I ought to be concerned about?

[Anastasia]

Nothing serious. It's all wardings and protections as well as various magical potions and reagents. Nothing directly offensive. Some are poisonous to be fair, but poisons are rarely a threat to you.

[Ebiris]

Alicia descends into the lab, her feet touching the ground and tremorsense telling her everything about what's inside this rock. The illusory Marie stays close to her while the real Marie holds position well outside for the moment.

[Anastasia]

Antenora stays with Marie while Sulia descends down.

Sulia lands just as you let your tremorsense work. You can feel it's a network of catacombed rooms and narrow passages. Some twist, some go straight and several lead to seemingly abrupt dead ends. You can feel the footsteps of many creatures, some big and some small.