"I have no intention of doing anything to this temple."  Lia informs the creature.  "You have nothing to fear from me."  She moves a bit closer.  "We are tracking an evil wizard who may have been here recently.  Have you seen her?"  She describes the wizard lady.

Krusk shares the information about the Clasp with the others

“Well, there be no much t’ demand immediate attention ‘ere,” Vor said. “p’rhaps we’d best be checkin’ th’ rest o’ th’ place.” He’ll head to the temple apse, aiming to check out the sleeping chambers. When he sees Lia with the faun mutation, he whips out his sword. “What be this creature!”

Chikra's standing guard in the library. She'll move to the door enough to see Vor in case he and Lia need help.

"Be easy." Lia says, giving her companion a glare.  She nods to the creature.  "Please tell me what you have seen..."  She waves anyone else away.

Hallanann is still pouring over the texts on the history of this place, clueless that there's a potential situation outside of the library.

Krusk is, like Hallanann, reading about the Clasp and has no idea about anything outside of the library. I mean, it takes 2 hours to find this stuff, so he’s still looking.

"No be harmin' ye," Vor says. "No harm from ye.  We be wishin' t' know 'bout things round 'ere, knowledge ye ken."  He sheaths his sword, hitches his belt and adopts an attentive, interested expression.

"Maghiel was here recently, and she has done something terrible.  Where are my manners. My name is Xurxos.  It's not often that I have visitors.  This may be of some use to you." Xurxos hands you a tattered old journal.  He points out some sections that may be of interest to you.  Magister Yama’s account of studying the Sidereon and its effects.  Yama discovered a key to the Sidereon in the titan cult’s chambers. Fearing the key could be used to awaken the Sidereon entirely, he hid it along with a cache of treasure in a secret chamber in the temple well.

The book also contains The true ritual bind sidereal servitor, and The following spells, as if written in a wizard’s spellbook: arcane lock, conjure minor elementals, contact other plane, find familiar, glyph of warding, magic circle, magic mouth, phantom steed.

Excerpts from Magister Yama’s Journal
EXCERPT 1
“I have made some small study of the Device the former caretakers have sealed away, that the strange precursor race called the Slarecians saw fit to build and sink into the earth here. The records of the Titan-sworn name it the Sidereon, for it is like a map of celestial spheres and a key to the understanding of them. I think it was once a sort of Mind, and that it now lies dreaming. Perhaps, as certain persons in the delirium of sleep often do, it might be inclined to a sort of speech if but the proper questioner were near. But this is careful work; for I dread what might come were such a sleeper to awaken, and what waking nightmares might follow forth.”
EXCERPT 2
“One gratitude I owe the sometime custodians of the Sidereon: They were at pains to cover over the glyphs it bears inscribed in the Slarecian tongue, which neither the ciphers of mortal minds nor the arts of the mage can render comprehensible. Indeed, it is writ that the contemplation of this strange language can make the mind insensible to the understanding of any tongue, and the mouth incapable of forming the words of one’s native speech, save in a gibbering that is itself a sort of contagion. For this, then, I am thankful to the Titan’s priests; that they caused plates of bronze to be hammered over the Device and thus rendered it less perilous, in that respect, for the eyes of Scarn-folk to look upon.”
EXCERPT 3
“It is impossible to tell what uses the Slarecians made of their wondrous Device, being alien entirely of intent and reason. But as the Titan-sworn once discovered, a practitioner well-versed in hidden arts may bring its energies to bear on numerous useful tasks, even half-dormant as it is: to see far beyond this world and into sundry other Planes; to call upon forces drawn from far spheres, such that the magus increaseth the power of his rites and spells; to perform True Rituals alone, or with but one or two assisting; and to commune with entities residing in the Occult Planes, provided their names are known to the caller.”
EXCERPT 4
“The writings of the blasphemous priests of Chern say much of the Sidereon’s power to cause sickness. How petty such creatures were, sitting at the threshold of this maker of miracles and thinking of nothing but its capability for rot! Should a mind of sufficient keenness set itself to the purpose, the Slarecians’ wondrous Device might serve to open the way to vistas undreamt-of in the lore of men and gods. Alas, the Titan-sworn may yet mock me from their unhallowed graves, for I must number sickness among the gifts I have received from my studies. Already I see the unnatural change take hold in my flesh, and wonder at what strange shapes I may yet come to take before it fails me entirely.”
EXCERPT 5
“I have discovered, hidden in the effects of the Titan-sworn, an implement that seems much like a sort of Key, and which like the Sidereon seems to be of Slarecian design. It would appear to fit a mechanism in the base of the Device, though I dare not try its working. Indeed, I think it better to displace such an artifact from within the walls of this sanctuary, so I have thus removed it, within a chest of gold and sundry other worldly effects, to the hidden chamber I have caused to be made in the wall of the temple well; and over it I have set a guardian.”

Krusk finishes up with his text, and seeing people at the entrance to the library, makes his way over. “Hey guys,” he says. “What’s going on here?“ He doesn’t talk about his findings because he doesn’t want to give away any information to anyone who may be an enemy.

"What terrible thing has she done?"  Lia asks as she takes the book.

"I am afraid that Maghiel may have woken the Sidereon.  I'm not sure how.  She would have needed a very powerful magical item to accomplish that.  Come with me." Xurxos opens a secret door that leads to the lower levels.  "Down here is the Sidereon, though I won’t go into its chamber myself now that it’s fully awake – It wants to eat my head from the inside”. Xurxos has a tendency to ramble.  He tells you of a treasure  – he helped build the secret chamber where it’s kept. "I  don’t know much about the treasure’s guardian, except that It’s old, and awful, and it never sleeps, and the Magister called it from the far dark outside the stars. I never saw it, for it’s made partly of ether stuff, and doesn’t show itself until it’s too late.”

“Kin this Sideron-whatever thing be, what, turned off?” Vor asks Xurxos.  “D’ we ‘ave t’ find th’ key in this treasure r’om ye be speakin’ aboot?”

"Do you know why she woke it?  Did you happen to hear if she asked it anything?"  Lia asks.

“Woken it and left again? Or is she down there? This thing cannot be moved, aye?” Chikra is suspicious of him showing up with this convenient package of information. Insight: 13.

((Let me know, StevenDeeds, when enough time has passed for Hallanann to have studied the books in the library and he is able to join the others. I'll stand by, assuming Hallanann is still reading until then.))

(Enough time has elapsed that everyone is together.)

Xurxos sulks, looked embarrassed and afraid of what he is about to disclose.  "I helped when Maghiel she arrived (as I would have to any guest seeking knowledge from the temple’s library), but grew increasingly concerned as I saw the types of books she was consulting. I begged her not to read the Magister’s journal or to take the Cantos, and especially pleaded with her to leave “the Device” alone; when she ignored me, there was little I could do that to watch in horror as she worked her magic."

Maghiel came to the temple of Madriel looking for knowledge and a way to use the Sidereon to carry out her goals, and she found both. Her primary goal is to resurrect the titan Mesos, siphoning his essence into herself, and stealing his power. With the book The Cantos of the Black Phoenix in her possession, she now has the knowledge she needs to create a ritual to accomplish this. She needs a number of rare items to perform the rite, and the Sidereon gave her the means to acquire the next artifact she needs: an Atrophian Orb, the eye of an unborn god. Channeling the raw power of the Clasp of Vergren, she awoke the Sidereon from its long slumber without needing the key Magister Yama had hidden away. Once the ancient Slarecian engine came fully to life, she used it to open a portal to the Plane of Dreams and stepped through. A few moments later (though considerably longer for her), she stepped back through with her prize in hand: a luminous, pearlescent orb of congealed ectoplasm, dripping with liquified ether. With the Atrophian Orb and the Cantos both in her possession, she departed, leaving the Sidereon awake and in motion behind her. As she left she was disturbed and in a daze, mumbling about Shelzar, The Ukrudan Desert, and the bastard’s flesh. 

 Xurxos isn’t entirely sure what she’s up to, but he knows The Cantos of the Black Phoenix contains forbidden rites related to necromancy and titans, and he hates the thought of such a work being in the hands of someone so clearly willing to wield power without any concern for the consequences. He did recognize the Atrophian Orb she returned with and remembers that the Magister once spoke of such things as “good for the sort of magic only the mad would dare perform – at least if you don’t want to see this poor world more broken than it already is.”

"First things first.  We need to shutdown the Sidereon.  It's energy has caused mutations in everything that has been in this area for a day.  You will likely succumb to mutations if it is allowed to continue to operate.  The Sidereon is located in the basement.  the stairs are in the kitchen."

"How do we shut it down? Is there anything we should gather? I doubt it is so simple as a switch."

“Dinna suppose we kin jes stick a knife inna it’s guts, can we?” Vor asks.  “I no be a good un fer majical thin’s.  Do it ‘ave a switch?” His tone is rueful, “I do be thinkin’ ther’ bes a guardian monster, th’r al’ays is.”

"Can it be shut down?"  Lia asks with a frown.