Still seemingly compos mentis, Sekathral scuttles around behind the aspect and chops at its hamstrings
Khazmia continues her flight around the fog, casting enervation on the Aspect if she gets a chance.
You lay into the aspect, teaming up to strike it from seemingly every direction, penetrating its guard as it tries to back away from Linah's shining blade.
Finally, though, its boneshaking death roar echoes through the Great Temple, as it thrashes and writhes, its unholy body peeling apart into writhing blogs of corruption that dissolve into noxious smoke before vanishing. In only a few moments, the body bursts apart in an immense wash of black smoke.
The moment of silence is rent by a nearly as deafening crack, and you spin to see the huge black pearl on the altar crack. A fitful wave of energy seems to spread from it -- a new Savage Tide -- but it dies aborning, the energy unable to go any further than the confines of the altar.
Taking a few deep breaths, you realize that while other threats are certainly likely to come to Golarion -- tentacled horrors from beyond, eternal winters sent from Irrisen, the devil worshippers in Cheliax and demonic hordes in the Worldwound -- you have likely just succeeded in stopping one just as deadly. In this long-lost subterranean temple in a jungle island far from all that you knew as home, you have, in fact, ended a major demonic threat and quite possibly saved the entire world.
With the ending of the sound of Linah's blade slicing and killing, Kyson tentatively calls out Linah's name.
"Linah? You there? You okay? How is the bad thing?" Kyson calls out, trying to dismiss the mist, then casting Dispel Magic to get rid of it so he can see and revive Linah if needed.
Thankfully, the hideous aspect seems gone (though the elemental still keeps smashing it, a fact that Kyson approves of) and Kyson moves over to check on Linah, then Zstelian, then finally Sekathral.
"Do you think...? Do you think that was it? The cause of the hideous pearls?" Kyson asks, moving to examine the remnants of the pearl on the altar.
Thinking quickly, he sends this elemental to destroy the altar as well lest it be a future conduit to whatever demonic entity was allowed here.
"I think...I think this might be it. Maybe."
Kyson looks at his companions to hear what they have to say.
"I...I'm not sure, Kyson, but I think it must be." Khazmia breathes deeply for the first time in ages,
"Linah, is there anything else we need to do to cleanse the area before we get the heck out of here?"
As ready as she is to head home, Khaz stands ready to do whatever is needed first.
"**** 'im", says Sekathral, making a gesture at the stain that used to be Demogorgon's aspect. "Stupid ****. Bet he didn't have anything worth ****ing taking here, neither"
He pokes around the room, anyway
After the destruction of the altar, Kyson gathers up all the friends and any loose magics that might be left around. He also does one last scan for any maidens that need rescuing...failing to find any.
"C'mon, let's get out of here. The sun...The Sun is waiting us. Outside."
Kyson airwalks back into the light.