Skyrim:Under Saarthal

Quick Walkthrough
# Meet Tolfdir and the trainees outside Saarthal.
# Follow Tolfdir into the ruins.
# Find Arniel Gane and help him find some artifacts.
# Use the Saarthal Amulet to escape the trap.
# Follow Tolfdir deeper into the ruins.
# Discover the danger within Saarthal.
# Talk to the Arch-Mage and receive your reward.

Detailed Walkthrough
Meeting at Saarthal
This quest automatically starts at the end of First Lessons, when Tolfdir suggests that visiting the ruins of Saarthal would be an excellent opportunity to learn more about the "various applications of magic throughout history".  Saarthal's location is added to your map (if you have not yet discovered it yourself), and Tolfdir and the other College of Winterhold students will start travelling there.  They walk the entire distance, meaning that it is easily possible to travel to Saarthal more quickly than any of your companions.  It takes them at least four in-game hours to make the trip, longer if they have to deal with multiple enemies (however, all of the students are given protected status at the start of the quest, meaning they are not at risk of being killed along the way).  If you are trying to find them en route, they walk from the College into the town of Winterhold, then turn onto a path that leads west from behind the Jarl's Longhouse.  You may find it convenient to do another quest in between First Lessons and Under Saarthal, instead of waiting at the ruins for Tolfdir to show up.

When Tolfdir arrives at Saarthal, you can advance the quest by selecting the dialogue option, "I'm ready.  Let's go."  At that point, the door to Saarthal unlocks and you can enter. You can select the "I'm ready" dialogue before Tolfdir actually gets all the way to the entrance — the dialogue option becomes available at the top of the stairs leading down into the excavation pit (at the same point where you are first told that you have discovered Saarthal).  You do not need to wait for the other students before proceeding with the quest; any missing students will appear as soon as you enter Saarthal.

If you choose to delay before proceeding with this quest, Tolfdir and the students will stand around outside Saarthal, indefinitely.  Tolfdir will still offer services, including selling Alteration spell books, without triggering the quest.

Second Lessons
 

:
Tolfdir will lead you and the other students into the excavation, playing the role of teacher and tour guide:
:As some of you may know, Saarthal was one of the earliest Nord settlements in Skyrim. It was also the largest. Sacked by the elves in the infamous "Night of Tears," not much is known about what happened to Saarthal. This is an exciting opportunity for us. To be able to study such an early civilization, and the magics they used...
When questioned about the importance of Saarthal, he will also tell you that:
:''We're particularly interested in the prevalence of magical seals placed on the tombs here. It's rather unlike anything we've encountered.''
In spite of Tolfdir's repeated warnings about safety, there are no enemies in the first rooms of the excavation.

Each of your fellow students has a different reaction to Saarthal.  Onmund is the least happy of the three, repeatedly complaining about being in the burial site of his ancestors: "''There's no chance anyone in authority approved this. Our ancestors should be allowed to rest in peace."  His concerns have evoked some sympathy from Brelyna, who comments, "To think, my ancestors destroyed the homes of Onmund's ancestors. So much bloodshed.''"  As usual, J'zargo is only interested in how he might be able to profit from the expedition, "''Do you think there's treasure here? Something to make J'zargo a powerful wizard?"

Once Tolfdir has led you through the first room, he will start handing out assignments to all of his students.  Your task is to help Arniel Gane find some artifacts:
:Ah, yes. Hmm. Well, why don't you see if you can assist Arniel Gane? He's one of our scholars, here working on cataloging our finds. I expect he'd appreciate some help in locating any additional magical artifacts here in the ruins. Any enchanted items will do; the usefulness of the enchantment is irrelevant. If you find anything, the class can look it over.
He also has tasks for the other three students, although none of them end up having any luck completing their tasks:
For Brelyna: Brelyna, my dear, why don't you search for warding magics. Anything designed to keep people out. Don't interact with them, just identify them.
Her subsequent response: I'm not seeing signs of any warding magics at all. Either they're not here, or they were removed long ago.
For Onmund: Onmund, please search that area over there. See if you notice any... residual energies. Alive or undead.
His subsequent response: I wonder if everyone else would be so happy to rifle through the bones of their ancestors.''
For J'zargo: ''J'zargo... what shall we have you do... Ah! Why don't you verify that we're the first ones here? Look for any amount of tampering with the tombs.
His subsequent response: J'zargo finds nothing but dust in these ruins.

The Saarthal Amulet
thumb|right|The Skyrim:Saarthal_Amulet|Saarthal Amulet
To complete your assignment, you need to venture deeper into the ruin, into the passageways west of the second chamber, where you will find Arniel Gane engrossed in his research. When you interrupt his work, he seems less than excited about having an assistant:
:Ah, yes. You. I remember you. You're going to help? That's fine. Just... Just don't make a mess of my work. I've only looked through a portion of this section. You, uh, you can look around in the chambers just north of here. Try and be careful, all right? We don't want to damage anything.''
Although talking to Arniel doesn't give you much new information about your assignment, it does update your quest objective and, even more importantly, adds quest objective markers to each of the four items: three Enchanted Rings and one "Ancient Amulet".

Finding the three rings is entirely optional and has no effect on the outcome of the quest.  They are lying on the floor at three locations in the nearby passageways.  Although the rings can be obtained without talking to Arniel, finding the small items without quest markers is very challenging.  If you do find one of them on the floor before talking to Arniel, the quest will update and you will have markers for the other two.  It is also easier to collect the rings before picking up the Ancient Amulet rather than after — once you have the amulet, your quest objectives update and you lose the quest markers pointing to the rings.  At any point after finding the Ancient Amulet, you can return to Arniel Gane and give him any Enchanted Rings that you have found.  He takes all the rings from you, but he is more concerned with the mess you have made than with the new artifacts, and does not give you any reward (not even a boost to his disposition).  Therefore, you may prefer to instead keep the rings with their +20 Fortify Health enchantment for yourself; they are not quest items and can be freely sold, given to a follower, or disenchanted.  Or if you really want to cover all bases, you can pick up just one ring, give it to Arniel, and then pick up the other two, and keep them (Arniel won't even recognize any additional rings after you give him the first one).

The only artifact that must be found to advance the quest is the Ancient Amulet.  It can be found at the northern-most end of the passageways, suspended in front of a brightly-lit, arched section of the wall.  You can actually pick up the Amulet at any point (before even getting the assignment from Tolfdir) if you are in a rush to advance the quest.  As soon as you pick up the Amulet, a spear trap activates behind you, locking you into the small space.  If Tolfdir is nearby he will suggest that you try using the amulet. In your inventory, it is listed as the Saarthal Amulet (under Apparel), and has an enchantment that reduces spell costs by 3%.  More importantly, equipping the amulet will trigger a visible resonance effect in the wall where you found it, causing Tolfdir to suggest "I wonder... what effect might your spells have?"  This is your hint: casting any targeted spell or shout at the wall while wearing the amulet collapses the wall.  The Flames spell given to all players at the start of the game is one possible spell, but any spell or shout cast at a target will work.  Collapsing the wall also lowers the barrier behind you, allowing Tolfdir to rush forward.

The Psijic Warning
Tolfdir is very excited about the newly-revealed sections of the ruin: "Well, this is highly unusual. And very interesting. Why in the world would this be sealed off? What is this place?.  You soon learn, however, that other people have also observed your actions, and they are less pleased with this turn of events. Once both you and Tolfdir have made it to the small burial room at the end of the new passageway, a ghostly apparition identified as Nerien appears, with dire warnings:
:Hold, mage, and listen well...  Know that you have set in motion a chain of events that cannot be stopped.  Judgment has not been passed, as you had no way of knowing.  Judgment will be passed on your actions to come, and how you deal with the dangers ahead of you. This warning is passed to you because the Psijic Order believes in you.  You, mage, and you alone, have the potential to prevent disaster. Take great care, and know that the Order is watching.

Nerien then vanishes, leaving you alone again with Tolfdir, who clearly did not see or hear the ghost, although he did feel "something rather strange".  When you tell him what happened, he is perplexed:
:''The Psijic Order? Are you quite sure about that? That's very odd. And danger ahead? Why that doesn't make any sense at all. The Psijics have no connection to these ruins. And no one's seen any of their order in a long time.
If you ask him why the Psijic Order is contacting you, he can provide some additional information:
:I have no idea, but it's fascinating. Assuming it's true, of course.  The Isle of Artaeum disappeared over a hundred years ago, and no one has seen them since. And yet now, suddenly, they have chosen to contact you? Why, it's intriguing!  If nothing else, I'd take it as a compliment. The Psijics have only ever dealt with those they feel worthy.''

Tolfdir finishes up by suggesting that the coffins in the room should be searched. Predictably, the coffins contain two leveled draugr, who jump out and attack on Tolfdir's cue.  However, the draugr also uncover the way forward, through the back of one of the coffins.  

The Dragonborn should then follow Tolfdir to a barred gate in a room. Tolfdir will stop and wait there and do absolutely nothing until you pull the lever and open the gate. From this point until the end of the dungeon, Saarthal is a typical Nordic ruin, containing leveled draugr enemies. There is a rotating pillar puzzle in one room; the symbol to match is above and behind each pillar. The second puzzle is like the first: match each pillar with the symbol behind it. The catch is that each of four pillars will turn as many as three of the other pillars with it, so the sequence is critical. The fastest solution is, from first entering the room facing all pillars, activating the far left pillar, then near left, then far right, then near right.

The Mysterious Orb
thumb|left|"Be bound here, Jyrik, murderer, betrayer Condemned by your crimes against realm and lord. May your name and your deeds be forgotten forever And the charm which you bear be sealed by our ward."
thumb|right|Skyrim:Jyrik Gauldurson|Jyrik Gauldurson, in his fire-resistant form
After exploring most of the second zone of Saarthal on your own, Tolfdir will catch up with you right before you enter a large room, approaching the end of the dungeon; this effectively alerts you that the quest is resuming. At the far end of this room floats a massive spinning orb, surrounded by a swirling energy barrier.  Tolfdir is immediately fascinated by the orb:
:''Well now... would you look at that.  I never imagined we'd find something like this.  Why is this buried so far within Saarthal?

However, he is unable to fully investigate, because approaching the orb attracts the attention of Jyrik Gauldurson, a unique and powerful draugr who has been trapped in Saarthal for eons.  Your initial attempts to damage Jyrik will inevitably fail, because he is drawing energy from the orb to make himself invincible.  Once Tolfdir realizes what is happening he rushes down to the orb and works on severing the connection between Jyrik and the orb.  After four seconds, Tolfdir starts to cast a lightning-like spell at the barrier surrounding the orb, which succeeds in making Jyrik vulnerable.  Tolfdir spends the rest of the battle maintaining his spell, leaving you to take care of actually attacking Jyrik.

Jyrik is still a challenging enemy, in part because of a rotating elemental shield.  Once you have killed him, be sure to loot his corpse for the Gauldur Amulet Fragment and Writ of Sealing'', both of which are necessary for the Forbidden Legend quest; if you had not previously started this quest, reading the writ or taking the amulet fragment will trigger it.  The Staff of Jyrik Gauldurson can also be found nearby.

Jyrik's death also causes the energy barrier around the orb to disappear, allowing Tolfdir to at last examine the orb more closely (and also allowing you to access a door behind the orb).  When asked what he thinks it is, he replies:
:''I have no idea! This is amazing. Absolutely amazing. The Arch-Mage needs to be informed immediately. He needs to see this for himself.  I don't dare leave this unattended. Can you return to the College and inform Savos Aren of this discovery? Please, hurry.
If you ask for more specific instructions about what to tell the Arch-Mage, he suggests:
:Let him know that we've unearthed something... Well, I'm not sure. Something unique, let's say. It's clearly magical in nature, but like nothing I've ever seen before. He should be most interested.''

Take advantage of the door behind the orb to discover a shortcut back to the entrance of Saarthal — and don't miss the Ice Form Word Wall and boss chest along the way.
 
Wrapping Up
Back at the College talk to Savos Aren, whose previously inaccessible Arch-Mage's Quarters have now been unlocked.  His initial reaction is amusing:
:''Please don't tell me that another one of the apprentices has been incinerated. I have enough to deal with right now.
You can choose between two follow-up responses, either "We've found something in Saarthal, and Tolfdir thinks it's important." or "We found some sort of... orb. Tolfdir wanted you to see it.''" Both have the same ultimate result, although Savos seems somewhat unimpressed by the latter response.  In the end, he thanks you and rewards you with a Staff of Magelight (suggesting that it may come in handy if you explore any more Nordic Ruins).  He also tells you to check with Urag gro-Shub for any possible leads regarding the nature of the artifact, initiating the Hitting the Books quest.

Completing this quest also has several advantageous effects.  Your rank in the College of Winterhold is increased from Student (rank 0) to Apprentice (rank 1), and your disposition with Tolfdir is increased.  Multiple radiant quests related to the College of Winterhold are also enabled once Under Saarthal is complete, namely Brelyna's Practice, J'zargo's Experiment, and Onmund's Request.  If you wish to start any of these quests right away, rush back to Saarthal and catch any of the four quest-givers as they start their slow walk back to the College of Winterhold. If it is night, after sleeping in your bed for one hour, they will appear in the Hall of Attainment. Otherwise, they can eventually be found around the college. Tolfdir's radiant quest, Tolfdir the Absent-Minded is also triggered by the completion of Under Saarthal, however, to start that quest Tolfdir must also be located in the College.  Since Tolfdir stays in Saarthal to continue watching over the orb, his quest can only be started when Hitting the Books is nearly complete (Tolfdir returns when, behind the scenes, the orb itself is moved to the college).

Notes
Tolfdir's dialogue topic leading you back to Savos Aren is bound to the death of Jyrik Gauldurson. If you raise Jyrik's corpse before speaking to Tolfdir, you will not be able to continue the quest until the effect wears off.
You may want to talk to Mirabelle Ervine after completing the quest to learn a few additional details about the Psijic Order.  She will tell you:
:''They're a very old order. Pre-dated the Imperial Mages Guild by quite a bit. In fact, the Mages Guild was founded in opposition to the idea of the Psijic Order, that only an elite few should have control over magic. No one has seen or heard from them in over a hundred years now, though.
Ancano learns that something was discovered in Saarthal, and subsequently tracks you down and interrogates you.  If you have gone directly down the stairs to The Arcanaeum and spoken with Urag gro-Shub, Ancano will stop you there.  Otherwise, Faralda warns you about the impending interrogation, and is concerned that you "mind what you tell him''".  (Speaking to her after Ancano has an incongruous dialog entry.)  When Ancano questions you, you don't have an opportunity to tell him anything — in fact, he does more talking than you do.
:Something was discovered in Saarthal that was significant enough that Tolfdir sent a new member of the College, alone, to deliver word. That sounds precisely like the sort of thing that should matter to everyone. Especially me.
This is a prerequisite quest for completing Forbidden Legend as one of the three Gauldur Amulet fragments is located in Saarthal, and  this quest is the only way to unlock Saarthal.

Bugs
 
 
 Use the console command   followed by   to solve this issue.
 
This can be resolved by leaving and entering again and he will be fighting some draugr.
 
 
 
 

Quest Stages