The estate’s guards - the reliable men-at-arms of a major feudal landholder, to be clear - were drilled for an attack, and don’t need Scarpo to alert them, not the ones who heard that scream.

And, as it happens, some celestials conjured by Mira and the King are now attacking! Their signal was the guards taking notice.

That’s a traditional decoy, and Mas was intelligent; some of the guards will pay attention to the foes now attacking them, but the rest are going to check with each other that there’s no intruder where they are - some of the guards are checking and noticing muddy footprints at the southwest entrance -

That is going to happen, yes.

The main guardhouse - where the half of the guard neither on duty nor on leave lurks, including the highly-trained rapid response team - is an old stone building, built far enough apart from the rest of the estate that no stray sparks from the overly fragile buildings might leap across. It was made to be defensible, and so has a single entrance, metal-faced gates set into the stone - 

Stone Shaped a solid wall across the front five minutes ago, got a teammate to toss a Silent Image over it so nobody would notice.

And a small, easily-blocked trap door that leads well away from the estate, the pathway narrow and defensible, eventually leading to a concealed entrance in one of the groves outside the estate, just in case someone needed to make a run for it.

The pathway leading through the rock the tower is built on?

Yes...

Stone Shape. An hour ago, this time.

This won't hold them forever.

No, but the King-In-Irons is almost to Scarpo’s chambers.

(By this point, Pedra is singing, though completely inaudibly.)

High Priestess Demicardinal Carme Scarpo is not noticeably more foolish than her chief of security, and makes her home at the top of a small tower whose walls are magically fortified, both of whose staircase entrances, public and secret, can be held by one soldier against an army. Presently holding the door to the spiral staircase that is the public entrance (the secret entrance has - as well as rather a lot of traps - a password on the Alarm only she knows, which even the King-In-Irons was not able to obtain) is the Bearded Devil she summoned and cast two spells on. One of them, obviously, was Spell Immunity (Dismissal), and the bearded devil is enjoying a good deal of cover from projectiles thanks to a cleverly-made stone doorframe.

And at this point there are only three people with the King-In-Irons. One of them is singing invisibly, one of them considers himself a trump card, and the third - 

The third slams into the bearded devil, breaking his invisibility as he does; he’s carrying a tremendously large black glaive, he’s covered with every enhancement spell a very creative two-wizards-plus-cleric-plus-bard team could think to lay in advance, there’s a shield hovering around him to deflect attacks, and also he is much too big for someone that fast and much too fast for someone that big and he’s wearing tremendously large black spiky plate.

Was the other spell Protection from Good, or was it Protection from Chaos?

Good.

Well, unfortunately for the devil, being removed from his Hellknight order (and his head removed from his body) did not, in fact, make Carlos Bosch no longer Lawful Evil.

It did give him a significant grudge against his former bosses, though, considering how unpleasant his stay in Hell was. And his glaive is as Heretical as he is. The devil doesn’t last for very long, especially after there are silver arrows raining down on it, too.

There are still more than a dozen disorganized three-man teams of second- and third-circle wizards and warriors of equivalent power running through the corridors, frantically casting spells as they attempt to locate just where the sound of the commando raid is coming from and occasionally being joined by a junior priest of Asmodeus who is very worried about later interrogation discovering a failure to defend a superior in the Faith and still has significant numbers of buffing and healing spells left. They are lead by the deputy head of security, who is only fourth-circle but is an conjurer of considerable talent, and keeps Dimension Door as a prepared spell (with which he got himself past the Stone Shape on the guardhouse doors).

And they catch up to the winding stair the bottom of which is only wide enough for a single man in armor, and the ones within ten feet of the stair feel chill horror and then they learn why, since the first three of them to go through are - in complete silence - chopped fully in half by a formerly-invisible man in golden armor, arrogant, handsome face visibly grinning behind his helmet. His sword is as black as his comrade’s, and seems to drink the life from the enemies he slays.

Does trying to swarm him polearm-wielding soldiers work?

It does not, actually!

Hold Person from the deputy head of security?

He doesn't roll a 1 on his save, no, why do you ask?

Then in that case he is now being bombarded by arrows and low-level spells from a distance.