And Lucy orients herself towards the largest pyramid, and yells at it. 

When she rained Law-light down on the worldwound, the Correspondence she spoke to authorize her companions' magic was a gentle murmur of tumbling pebbles in a stream bed. 

This is something else entirely. It is loud. More than that, it jars the teeth and echoes in the bones all out of proportion to its volume. It is, or seems, in some sense more real than sound normally is; than the mortal speech she herself speaks to her companions is. 

(She orders the stone to crumble, and fall.) 

The stone metaphorically orders her to screw herself! It was enchanted by Geb, second greatest wizard of his age, and, and it was not enchanted so that some penny-ante archmage could just demolish it! It is just as indestructible and unaging as any other magic item - a good deal more, in fact, because most magic items are only coincidentally unaging, and this was made to shrug off magical siege engines, and she is powerless against it.

... Is what it would like to say. In fact, in a pure contest of strength, the wizard who laid these spells was arrogant, in the full fury of his youth, and against the might of Correspondence the pyramid shakes, and the stone begins to slowly crack and break open; not with the speed of ordinary rock, but nonetheless it does so.

The first creature to get anywhere near her is a summoned host devil that happened to be around, a grotesque black fly with vulture wings and a lot of spears, that was teleported out of one of the lesser pyramids specifically to test her defenses and telepathically report back.

It gets two arrows to the face and blinks out of existence.

de Caserta is chanting outright, making complex gestures as she speaks the words to a powerful spell - 

- The Dawnbringer is still ready, waiting for a serious attack -

Count Tiriac still has arrows, lots of arrows, all ready to fire.

(Arazni, in her pyramid, is telepathically giving orders through her relays -)

- A petty lich on the street whose magically shielded palanquin has been tossed down rises out of it, flying, to see with horror as his bones become living flesh again - 

"WHAT HAVE YOU DONE?"

Lucy, who is still entirely within the full fury of her youth, rams the crack in the building while still yelling about breaking rocks.

de Caserta finishes a spell, and a half-snake, half-humanoid woman with pointy ears, fangs, wings, and a glowing sword pops into existence. 

" - We're trying to rescue Arazni again," she curtly says, and the azata nods and starts singing.

(She has a beautiful voice.)

... This is, actually, an interesting puzzle for Arazni, who is still sort of vaguely capable of recognizing that interesting puzzles are a possible thing, when she is compelled to think about it if not otherwise.

She is under orders to rule and protect the state of Geb and not to try to free herself from Geb's control. She technically does not have orders not to resurrect herself, but the odds of the resurrection still leaving her capable of obeying decisions and fighting off an attacker are negligible. The attacker is clearly at the level where the typical blood lord can't do anything (also, the typical blood lord is hiding in a closet from the horrible light).

Arazni has a plan that might work. It would put her at some risk. She could just attempt to sic every called-not-summoned outsider in the city on the colossal crab outsider, and hope that did it...

... but Arazni is not, actually, a conjurer, and Geb is not a conjurer, and she did not prepare Gate today and they have no outsiders in the city more powerful than a standard Planar Ally spell can call.

(It is at this point somewhat unfortunate for Geb that there are limits to which a bound undead can be forced to obey. She can be, and is, forced to be intelligent; she can be, and is, forced to try to solve the problem. She is not forced to win. She is not, actually, forced to be Chosen of Aroden, because that is not, really, something you can force.)

Mythic Time Stop, she and four of her strongest graveknights, holding hands.

Teleport.

Directly onto the crab. And, immediately, before the light can return life to their bones - 

Antimagic Field.

(Antimagic fields dispel mortal magic, but have no effect on gods or artifacts, such as the Archmage's Staff of Arazni she clutches in her withered left hand.)

Quickened Arazni's Fireball (Cold).

From the perspective of the adventurers, such as Count Ristomaur Tiriac, a corpse with withered skin stretched over rotten flesh and an ancient Osirion staff in her right hand and a shield in her left, dressed wholly formally as a queen and covered with what are obviously magical artifacts of terrifying power and with a hovering rapier next to her just appeared on top of Lucy along with four suits of crusader full plate with glowing eye sockets, all wielding deadly weapons. Within a ten-foot radius of the corpse there is no Life-light, nor any other magic detectable, and within about the same second she hit them all with a blast of lethal ice, which still functions because screw you. (The floating sword next to her, still floating even in an antimagic field, will also hop briefly outside of the antimagic field to stab Lucy.)

"Arazni!" and he'll shoot her twice in the heart as a readied action, which, since his arrows lose all magical properties when they enter her Antimagic Field and she's a walking corpse, does approximately nothing.

The four graveknights were waiting for this! They are going to burst out and melee the mortals. Both parties are in an antimagic field, but the graveknights are supernaturally strong and are going to immediately begin full-attacking whoever happens to be within reach of them - one per adventurer, plus one fellow with an adamantine sword who is going to try to see if that's more effective against diamond scales than mortal weapons usually are.

de Caserta, whose ceremonial robes technically count as armor, goes down in the first round after three greatsword strikes, head stricken from her shoulders. Dawnbringer Kais and count Tiriac, who are wearing actual armor, are technically not quite dead yet; in this they are assisted by the fact that Tiriac's wolf has tackled and is presently wrestling with the one who went after him.

(Kais had, actually, been prepared to try to counterspell anyone who tried to use magic near him, which would plausibly have worked even against Arazni, since he had Greater Dispel Magic. Unfortunately...)

Wow, okay, rude. Also ow? But mostly rude, Lucy is pretty good at working around ow, and it's not like any of that hit anything important. 

Lucy's first action is to grab de Caserta's corpse with one massive claw and wrench her out of the antimagic field, where the life-light still shines strongly. Her second action is to attempt to do the same with Arazni. 

First action: Completely successful! de Caserta immediately returns to life.

Second action: Arazni dodges the claw with a skill and grace that suggests she is really, really implausibly good at dodging things! Unfortunately, given just how much space the claw takes up, she needs to get out of melee for that.

... This results in three of the graveknights and Count Tiriac not being in an antimagic field any more.

Count Tiriac will shoot Arazni in the center of mass six times, now. "Antimagic field -"

And that is when every demon, devil, daemon and other Called outsider in the city will come boiling out of the pyramids straight for Lucy.

They only move at about 200 feet an action, though, so there's going to be a little travel time here.

"Sarenrae has sent us!" and Kais will deliberately fall off Lucy, being stabbed in the process again, and as his dying body falls he will be instantaneously revived by Life-light, catch on, and give Lucy an instantaneous blessing to whatever thing she does next.

... The reanimated graveknights will stop still, staring. Two of them will burst into tears; the third will hurl himself off while attempting to cut his own throat before he reaches the ground.

What Lucy is going to do next is concentrate very hard, on using her supernatural speed—

To make sixteen grab attacks against Arazni in the next round.

(Lucy’s supernatural speed applies less neatly to dexterity than going really fast in a straight line, but less is not none—a full Messenger might need to dodge through asteroid fields, even if they wouldn’t do it at full speed.)

(Third Graveknight is, for obvious reasons, fine. Physically.)

Hmm. Well, before those arms get to her, how does Lucy feel about another Quickened Arazni's Fireball, followed by Finger of Death, channeled through her rapier?

Well, the fireball is painful, but given that the damage from the last one healed right up when she got Arazni away from it, it’s not too bad.

The Finger of Death does make her flinch! Congratulations! Lucy only gets off thirteen grab attacks.

Then Arazni is grabbed!

The FIRST thing Lucy will do after getting her held in place is to try to yank the staff out of her hand. Or her hand off her wrist, that’s also fine, Lucy can fix it later.