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Commentaire de Reignac

You can stealth to it, though you'll need to take the long way around because of the locked doors.

Commentaire de varenne

Long Buried Knowledge comes after Le bon Suramaritain - Statecraft storyline. More questchain info
Need to have 8000/12000 Honored with Souffrenuit to start this questline
This questchain is attune for The Arcway and Court of Stars Mythic only dungeons

Here is Long Buried Knowledge video: https://www.youtube.com/watch?v=_tzGEIfvb6c

And here is storyline related to this quest:

№ Quest Note Video
73 Une occasion rêvée https://www.youtube.com/watch?v=jP_qeZ8tghI
74 Ou contre nous AP Need 1200 Mana ancestral https://www.youtube.com/watch?v=K0GLCi-7XiU
75 La mort lui va si bien Cimier d'Ombrelonde corrompu https://www.youtube.com/watch?v=2-RMU423Sx4
76 Info ou intox https://www.youtube.com/watch?v=3nmGfNJ9Wlg
77 Avec nous https://www.youtube.com/watch?v=0r1E_bKOcxY
78 Des menaces à peine voilées Médaillon forgé par les Titans https://www.youtube.com/watch?v=GsSZGFnWtzg
79 Vote de confiance Pièce sacrenuit enchantée https://www.youtube.com/watch?v=xmEXXk5qva8
80 Dans la poche Pièce sacrenuit enchantée https://www.youtube.com/watch?v=B9w834jKAl0
81 Le défenseur de Ly’leth Idole lueur-de-lune https://www.youtube.com/watch?v=ipaACK8Vfjk
82 Les bénéfices de l’amitié Pièce sacrenuit enchantée https://www.youtube.com/watch?v=VcUsDGTd_No
83 L’Arcavia : l’ouverture de l’Arcavia Tome de conscience dimensionnelle The Arcway https://www.youtube.com/watch?v=Xy-qf0bmtXo
84 Cour des Étoiles : tout vient à point à qui sait attendre Ancienne idole qiraji Court of Stars https://www.youtube.com/watch?v=n7gyknf33ec
85 L’Arcavia : un savoir depuis longtemps enseveli The Arcway https://www.youtube.com/watch?v=_tzGEIfvb6c

№ column is quest approximate order in Suramar storyline

Commentaire de samuraiveru
All 3 quests that finish this chain:

L’Arcavia : un savoir depuis longtemps enseveli -> Mythic Dungeon: L’Arcavia
L’Arcavia : l’ouverture de l’Arcavia -> Mythic Dungeon: L’Arcavia
Cour des Étoiles : tout vient à point à qui sait attendre -> Mythic Dungeon:Cour des Étoiles

Are inside Mythic Dungeons. There's no LFD for mythics, you will have to search for a pre-made or make your own group.

If you received these quests, it means you are unlocked for the dungeon and you can enter. Most likely, the actual 'lock' for the dungeon is the previous quest in the chain.

UPDATE: It has been confirmed by several players in the forums that these quests CAN BE SKIPPED if you are only worried in getting Le bon Suramaritain that is also part of Guide des îles Brisées, première partie that will (along with part 2) allow you to fly in Legion.
These just give rep and rewards but are *not* requirements for that section of the Suramar loremaster.

In order to get Le bon Suramaritain after this, you need to:
- Do the quest Terreau onirique that is inside the raid Le Cauchemar d’émeraude. You can do that raid and loot the item/kill Xavius in any difficulty. So you can wait until LFR wings are open and progress there. This one in particular belongs to "A growing crisis" within Le bon Suramaritain.
- Get exalted with Nightfallen. Once exalted, you will get "A Change of Seasons" within Le bon Suramaritain.

Commentaire de Treacon
Having this quest means you can enter The Arcway dungeon.
It's only difficulty (right now) is Mythic and before you have this quest in your log you can not enter it.

Commentaire de wolframwow
Take the portal to Sanctum of Order to get near the dungeon!

Commentaire de Zeldeza
Noo! I completed both other Mythic dungeon quests but I didn't know about this one because the quest-giver had the blue question mark over his head, wanting Ancient Mana crystals. Now, I have to wait until reset.

Commentaire de xxmana
If you already did The Arcway for the Opening the Arcway quest, you can just go in on the same lock and pick the item up, the banshees are slow and easy to a void and worst case scenario you can buy an invisibility potion.

Commentaire de Malvenue
Cannot be completed in Mythic+ dungeons. Item will not loot, kill credit will not be awarded.

Commentaire de 9mmx19
Oh jeez this is from Valtrois not Thalyssra -_-

Commentaire de Hetsig
This might be obvious to some but was a head scratcher for me.
You will need to feed Arcaniste Valtrois her 50 mana before you can turn this in.
I got "You can't to that right now" when i didn't and i didn't have 50 mana at the time.

Commentaire de nagi603
If you are a hunter, it is stealth-able. MM/SV Camo + feign death are your friends, (e.g.: if the rats jump on you, just run a bit ahead with cheetah/disengage and fd) even if you are - like me - BM-main.

Commentaire de ZeroHavok
Apparently with the current patch, if you have completed "Good Suramaritan" beforehand you cannot turn in this quest.

Arcanist Valtrois' new model doesn't work with the quest. I ticketed a GM and he said they were aware of it and devs are working on a fix.

Commentaire de JolietJerry
Since I didn't see it mentioned in any of the comments posted: The Suramar Leyline Map is found off to the right when you enter the area where Ivanyr is located.

Commentaire de Tulgaat
I was able to solo this as a feral druid with the help of a Draenic Invisibility Potion and the Incarnation: King of the Jungle talent. Follow the right wall which is the shortest path to the Suramar Leyline Map. Drink the invisibility potion before the rats engage. Run towards the map location when the invisibility potion expires activate King of the Jungle and stealth which will allow you to get to the map. Time your acquisition of the map with mobs pathing far away.

Commentaire de Godmu
I just turned the difficulty to heroic and it was a breeze, there are absolutely no adds and just walk up loot the scroll and walk out.

Commentaire de Yogilaw
So...Both 'Opening the Arcway' & 'Long Buried Knowledge' are QUESTS hidden inside a Mythic level dungeon, ok? Couple of pointers for those wanting to complete these Q's;

1. Don't join a group that is using Keystones - you can't loot stuff in these instances so won't be able to collect the scroll needed for Long Buried...turn in.
2. If you're not used to running dungeons (or not very good) this ain't gonna be easy, & maybe expensive!
3. If you are a dungeon noob or not too experienced, & can find a non-KS group (not easy on some realms), make sure that your companions have a good idea of what to do when you're down there, otherwise this could take a very long time & cost a fortune in death tax.
4. Make sure everyone in the party understands the objectives; are you looking to go after all the bosses, or just grab the scroll & kill Vandros? This will make a difference as to how you work your way round the chambers.

Frankly, the idea of putting Q's behind Mythic instances is daft imho. It is forcing players into doing stuff they may not want to, or be good enough to. Have seen a comment on here that @Godmu changed the difficulty level to Heroic on this. Not sure how that works, but it will help for less practiced dungeon players.
As for me, now I've completed these & the embedded CoS Q, I'm done with dungeons. 840 gear in Mythic - you get better stuff on a WQ & without the cost of dying.

Commentaire de chrizzyp13
As of patch 7.2 this quest item CAN be looted from the new heroic difficulty for <the Arcway>

Commentaire de Jamow
At no point is the term 'Heroic' nor 'Mythic' described as required for L’Arcavia : l’ouverture de l’Arcavia , or http://www.wowhead.com/quest=42491. Normal should be lootable for these required items.

Commentaire de TonyTheHorse
I have a dumb question. Does anyone have coordinance for the Arcway? Having a hard time finding it following my mini map.

Commentaire de TwILeK
Can't finish this quest, because the quest giver isn't active when finish it :(

Commentaire de Mahness
This can be solo'd by a geared 110 and or a stealth class. I stealthed to the designated location of the scroll, looted it, and the quest was completed. (7.2.5)

Commentaire de Werlwind
If you struggle to turn this in(after 7.2 maybe?), finish La requête d’Arluin first, then return to Shal'Aran and First Arcanist Thalyssra will be the one to turn it in to.

Commentaire de SlySnake
I killed everything I can get to, no boss shows up though.

Commentaire de Confidence
The Suramar Leyline Map is located in The Arcway (Dungeon/Instance), Forgotten Library (left-most sanctum of the instance) at waypoints {23.31,64.71}. The dungeon itself can be accessed through the Sanctum of Order.

Commentaire de Metoda
UPDATED

they way to L’Arcavia could be a bit tricky, you can use this video to find the entrace

use this short video guide!

https://www.youtube.com/watch?v=DlM0RVAu9PE

Liens

L’Arcavia : un savoir depuis longtemps enseveli

Obtenez la Carte des lignes telluriques de Suramar dans l’Arcavia.

	Carte des lignes telluriques de Suramar (1)

Description

La ville de Suramar est construite sur un ancien réseau de tunnels connu sous le nom d’Arcavia. Ces souterrains sont abandonnés depuis fort longtemps du fait de l’instabilité d’une partie de la caverne, et nul ne sait ce qui s’y trame aujourd’hui. Quoi qu’il en soit, je crois que vous y trouverez quelque chose d’essentiel au succès de notre quête. Mon peuple a jadis effectué un levé détaillé des lignes telluriques de Suramar et de ses environs. Ils ont sans doute entreposé ces relevés dans la bibliothèque de l’Arcavia. Trouvez cette carte pour moi, voulez-vous ?

Progrès

Achèvement

Récompenses

Vous recevrez :

Gains

Lors de l'achèvement de cette quête vous gagnerez :

300 points de réputation avec Souffrenuit

Vérifiez si vous l'avez déjà terminé en tapant :

/run print(C_QuestLog.IsQuestFlaggedCompleted(42491))

Guides

Comprehensive Suramar Guide Nightfallen Reputation Guide