But it is possible for Achaekek to be moved, by a sufficiently ludicrously powerful but mundane impact; sent hurtling by an explosion along a roughly predictable vector -

And the Starstone claims another divine victim.

There is born then, around the Starstone, a greater and far more terrible glow; Achaekek's splattered energies are drawn toward it, pulled inward as if by the gravity of a Sun.

And now the gods are focusing a great deal of their attention, upon this place; for one of the most ancient of divinities is dead.

There is nothing to distract those gods, for Keltham has not unleashed Rovagug.

Keltham has not unleashed Rovagug as his distraction, and to exhaust Asmodeus in battle against Rovagug rather than let Him release It and fight in battle on Its side.

But Keltham did mean to release Rovagug, as was in his own interests, if nobody made him a better offer.  And since Keltham did intend that sincerely, and not in any hope of hearing a better offer, it became possible to make him a better offer.

Appearing in the heart of a fireball that hasn't faded, but whose first great blast and force is spent, Pilar Pineda throws her whole form upon the searingly glowing Starstone; touching it not with a tentative hand but with her whole skin, being naked but for a crown out of Hell.

And the greater gods and gods of Golarion feel that touch, as they felt the last hand to lay upon the Starstone; as they felt the last beginning of a god's birth.  But this time, they know, there will be no Achaekek to stop this -

So all those gods do turn to stare at her, at this one being born; and they see that she is being born into Lawful Evil.

Asmodeus would usually slay any Lawful Evil would-be ascendant.  He wants no additional competition from true-gods, or from Powers of Hell that He has not personally promoted to Their places.

This case is unusual.  Asmodeus has not been able to make out very much of certain events ongoing in Golarion; much of those squirrel-affairs have been illegible to the lesser fragments of Him that watched over the tussling.  But without having gathered more of Himself and reflected, without time to think beyond moments of first reaction, He can see, or remember, these facts:  That this soul had sincerely venerated Him in the past and as the proper tyrant over itself, though its feelings are less legible to Him now; that it was chosen to be oracle of Cayden Cailean; that it's consumed much of Cayden Cailean's divinity already; that it was a highly favored slave of Asmodeus's own most-favored slave; that it is yet Evil-predominant, but contains more superposed Good than it did before it started consuming Cayden Cailean; that it is very Lawful for a squirrel, though with prominent Chaotic streaks likewise grown...

...and He can sort of see what might be a legible intent to serve Him and be tyrannized by Him, if this squirrel becomes a god - and not in a way where that's meant to be conditional on Him helping it ascend.  But His sight of that intent is vague as yet, and there could be all sorts of compact-gotchas within the vagueness.

It is His estimation that something significant is afoot, and that this isn't all of it. This novel and worrisome destruction in Golarion will swiftly inspire many negotiations and interventions; perhaps this ascension was the ultimate aim of that destruction, or perhaps there is more coming, in which case He doesn't want to expend His resources now on this fight when a fight of far greater significance may lie ahead.

He will not bestir Himself, then, unless someone intends to pay Him; the weak godling can live or die as suits the interests of others.

And Urgathoa sees, but does not care, for in this matter there is not yet obviously food-resource to be glutted nor the prospect of resource being taken away; and so, like Asmodeus, She withholds for now Her hand;

And Lamashtu, who was once demon lord and is now a far more terrible goddess, decides that Hell and Lawful Evil need no more power, that may be turned against the Abyss;

And Gorum holds nothing personal against this aspirant, He enjoyed her assault on Absalom and her ambush-slaying of Achaekek was beautiful; but the world has more than enough Law already, thank you;

And Sarenrae, who smites also Evil, turns Her attention here, to suffer not this empowerment to pass;

And Desna, the most ancient power of Chaotic Good, does likewise turn an uncommonly vast and cold gaze upon this place where a new Power of Lawful Evil seeks to be born -

- and recoils, in shock, in horror, for what stands between Her and that one's destruction.

You shall not pass while I live, Cayden Cailean sends to all those gods, and places all that remains of Himself between Them and Pilar Pineda.

And Iomedae...

Is not there.

Earlier:

Iomedae!  Emergency situation that the fully-informed fragment of You has been apprised about!  This information is given to You under the condition that that it will be used to benefit Your interests without harming Keltham's interests!  We bargained with Keltham to give him a less destructive distraction instead of him releasing Rovagug, and You're it!  If You act at the right time You'll be able to get away with something You couldn't otherwise do!  Gather all of Yourself, at once, and then -

Now:

When last treaty was made between gods, Iomedae swore not to open Zon-Kuthon's vault, nor to connive toward freeing Zon-Kuthon.

The agreement doesn't, technically, say that Iomedae can't do this, which is not something that even gods would have foreseen Her doing.  This scenario required several sequential then-unseen implausibilities, and if you negotiate about every combination-possibility like that, you really will end up negotiating too much.  Gods are large, but not large enough to defeat combinatorial explosions.

The gods would have expected, if Iomedae gathered Herself and went inside the vault, that Zon-Kuthon would promptly eat Her; for She is smaller and younger and would be to Him as a snack.

But what actually happens -

Long ago, at least as mortals count time, a young human girl knew (it was not really a matter of deciding) that the right thing to do was spend all her life trying to fix everything everywhere.  And some time after that, she knew the right thing to do was become a god and go on trying to fix everything everywhere; though she didn't think that, even as a god, she would live to see it fixed...

A furious blaze of light, shining brighter than it did in Heaven, enters into Zon-Kuthon's vault where a great Evil lies wounded and helpless.

Some other possible god of paladins might've found this part difficult, contrary to Their domain; but Iomedae never was the god of fighting Evil.

She falls on Him like a mouse nibbling into a comatose elephant.

OKAY WHAT NO HE SUDDENLY HAS LARGER PROBLEMS, NAMELY IOMEDAE IS CONSUMING THE WHOLE POWER OF AN ANCIENT GOD—

She doesn't see how Iomedae can get away with this, but has little choice but to back Her once it's begun—

Even if Iomedae somehow survives this, it will trigger new divine treaties about Golarion's broken prophecy and divine opportunism, which won't be to Chaos's advantage.  But if this is Cayden Cailean's last wish, though She doesn't understand it, then to defend Iomedae She will also go—

Lawful Evil, Lawful Good, what care I?  You may go about your conflict there, while I take care of this Lawful Evil nascent here.