Lamashtu knows then that it is too late to defeat this newborn god without great cost.

She does briefly engage Pilar Pineda's concentrated true self, in hopes of dealing Her some lasting wound while She is young and stupid; but Pilar Pineda proves to be a difficult goddess to scar, if not hurt.  So that fragment of Lamashtu's attention sniffs and goes upon its way.

But then another comes to that place, where the Starstone floats upon a sea of lava that is all that remains of the Starstone Cathedral—

(even as Pilar Pineda's body fades away and into Her, leaving behind that crown, formerly a lesser artifact of Dis, which that body wore into transcension)

Carissa Sevar comes forth in crown and belt, and attired also in concealing flames of her own power; it is the least of her concerns, that she wants this moment to be depicted truly if any depictions survive, but it is yet one of her concerns.  And if there are other thoughts or emotions that she has, they are not outwardly visible, and any future religious iconography suggesting otherwise will be heretical for that it is a lie.

And she too lays down her mortal flesh upon the Starstone.

It is at this point that a number of gods start to worry that Golarion may have an issue.

(And while there are both Evil gods and Good ones that turn away from besieging or defending Iomedae; while Lamashtu turns back Her attention upon the ruined Cathedral, and calls out to Urgathoa and allied demon lords as well; it is the Neutral gods, drawn away from the vault's siege to try to halt all these unnegotiated ascensions, whose rerouting ensures that Iomedae will not perish quickly.)

The gods come, then, to destroy this next god being born into Lawful Evil.  There is too much unplanned divinity and balance-upset originating out of this place in Golarion; if this event were in Their interests it would have been negotiated so.

Not one of You shall harm Her.

Divine blows fall upon Pilar Pineda like rain, then.

And She suffers, and withstands, and She hurts terribly but She is not broken; for that is Pilar Pineda's nature as a god and a good slave.

Carissa Sevar's journey toward godhood goes slower than that of Pilar; she's trying to absorb more power and is starting out without being already overstuffed with divinity.  She has more time, then, to focus some fragment of her attention upon sending divinity flowing through herself, purposefully, into the crown that she wears, which once was a mere lesser artifact of Dis.

And before her mind grows enough that it must divide, with her last biological breaths, Carissa Sevar performs her last and greatest feat of mortal Spellcraft, the completion of a true and major artifact.  Correctly.

And then 'she' becomes 'Her', and Her attention fragments.

You cannot, as a mortal, structure how you'll splinter, on ascending to godhood. If you could, new gods would not be so utterly vulnerable and helpless; things as weak as a newborn god are not generally all that weak. But to be splintered, when you were previously mortal, is to lose all the patterns that directed your mind towards your aims, to be made up of terror and eagerness and loneliness and grief and thwarted plans, all separately, with no guarantee each element will remember that it's meant to coalesce.

Having prepared in advance, having been very wise, having made of yourself something more coherent and more careful than a mortal generally is, helps; but not enough that you could ascend under fire and expect not to die.

Carissa is shaped, all through, for this, and still half the fragments of herself will have hardly any recollection of what they are, or where, or why.

But they know that they might die, if they don't pull themselves together quickly. That's not a truth she memorized for just this one occasion.

And there is not a single fragment of Carissa Sevar which would accept that it might die.

Her pieces begin to pull together, partially, piece by piece, and as they do, She begins to claim Her portfolio and define Herself as a god.  Lawful Evil is in that; and also, freed from Zon-Kuthon's grasp, loss and pain, but the surviving of it; from long-lost Amaznen, artifice, knowledge, magic; and even from Cayden Cailean, traces of competition and resolve -

—but there's a problem, now, which is that Pilar Pineda may be stronger than Cayden and not already exhausted, but She is really really not at all experienced at being a god or fighting godwars, and Carissa Sevar is getting larger and more distributed than Pilar can protect just by standing all the way around Her—

He is dead—

But Cayden was told how it would go—

And before then, He—

Does it matter, when people pray to gods?

Does it help Them, when They fight?

It is commonly thought that it does help, some tiny bit, so that if many people pray, maybe that helps enough for a god to notice.

And through all the taverns of the world and the wild words that drunks dream up, as is His domain, a rumor was spread—

—though also there were other rumors, contradictory or less alarming ones or naming earlier or later times, to make their way to high officials and those charged with officious panic.  But once a time was set and communicated to His representative, then to His true flock and all the ordinary people of Golarion beyond Absalom, to them this tavern-rumor was spread—

That at a certain hour and a certain day,
There would come the next godwar,
A flickering of the sky visible by day or night,
And the meaning of that godwar would be this:

That Carissa Sevar
(—have you heard the word about her, that she freed Wanshou from the great elder kraken that ruled it since Aroden's death, and gave it better government; that Cheliax's Queen suddenly bent knee to Carissa Sevar as her Empress, and Carissa Sevar at once began to rein in Cheliax's worst excesses—)
would ascend to godhood on that day,
under the star of Lawful Evil,
and other Evil gods would try to slay her,
for that if she won,
she would rein in Hell,
and create an alternative to horror,
not a paradise, still a place where real evil would be judged,
but where souls would not be shattered for their sins;

and even those already in Hell, whom you fear lost there,
from suicide, from exposing a child they couldn't save,
would then be rescued and given succor—

And of course it isn't believed.

Who would believe it?

It's not the sort of thing that anyone repeats because they believe it.

Godwars don't occur on schedule.  Prophecy is shattered, and much of the point of prophecy in the first place was to avoid godwars.