Talk to the Ranger next to the quest giver. Then you will get teleported to Kil'Jaeden's lair aka. The Sunwell.
Quest
The Purification of Quel'Delar
A World of Warcraft quest in Sunwell Plateau. Facts and objectives from the current retail game data.
The highest voted Wowhead comments for this page. They are community notes, not TheWoWDB comments.
When you throw the Tainted Quel'Delar in the Sunwell, following scripted event happens...
Chamberlain Galiros yells: My lords and ladies, I present <Player>, bearer of Quel'Delar.
Lor'themar Theron says: We shall see.
Grand Magister Rommath says: Look at it, Lor'themar. It certainly is Quel'Delar.
Lor'themar Theron says: So it is. You have may thanks, <Player>, for restoring Quel'Delar to its rightful owners.
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At this point, Quel'Delar knocks back Lor'themar Theron and you (player) gets a ice chain CC buff. Guards yell at Captain Auric Sunchaser and move towards him.
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Sunwell Honor Guard yells: My Lord Regent! What have they done to you?
Grand Magister Rommath says: What is the meaning of this treachery?
Sunwell Honor Guard says: Drop your weapon and surrender, traitor.
Captain Auric Sunchaser says: This is not my doing, Rommath. There is no treachery here.
Captain Auric Sunchaser says: Call off your men. Lor'themar's own foolishness caused his injuries. Quel'Delar is not chosen, it chooses its master.
Grand Magister Rommath says: It seems the captain is correct. Quel'Delar is not to be ours after all.
Grand Magister Rommath says: Guards, return to your posts.
Grand Magister Rommath says: You will have what you have come for, <Player>. Take the sword and begone. And you, Auric, have a care what you say in this sacred place.
Captain Auric Sunchaser says: Carry the sword back to Dalaran through that portal, <Player>. You have done what many quel'dorei have dreamt of for years.Quel'Delar has been restored at last.You can then Pick the sword from Sunwell and take the portal to Dalaran in the North-Esat corner of the room.
Just a little info I dug up since the quest bugged for me (couldn't loot the restored blade). Just zone out, abandon quest and retake it from the npc. You get given the item from him and everything is well :)
At a glance
The Purification of Quel'Delar is a quest for level 25-30 in Sunwell Plateau. It rewards 1 reputation reward.
Quest facts
The client quest POI data records no map location for this quest, so no map is shown.
Check whether you have already completed this quest
in-game: /run print(C_QuestLog.IsQuestFlaggedCompleted(24553))
Description
I admit, I was skeptical that you had actually re-forged Quel'Delar and I did not expect Thalorien's spirit to reveal itself to you. You cannot understand what it means to me and to the rest of my people that Quel'Delar has been recovered. As promised, I will admit you to the Sunwell and you will find the leaders of Silvermoon within. Carry the sword to the chamber of the Sunwell and immerse it. The blade will bond to you. When that happens, carry it to Caladis Brightspear at Quel'Delar's Rest.
Community notes from Wowhead · 48 comments
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Reward details
Reputation: The Silver Covenant +500
A militant core of high elves that rejects the admission of blood elves into the Kirin Tor. They've united under the banner of Vereesa Windrunner and joined the Alliance forces in Northrend.
Reputation group: Alliance Vanguard.
Other quests in Sunwell Plateau that reward The Silver Covenant reputation: The Purification of Quel'Delar (+500).
Item facts are the current retail client’s (ItemSparse); the specialisations for a pick-one item are the ones the Blizzard quest API lists; faction and currency text is the client’s own. Lowest listed price = the US commodity auction house now.
Where this quest fits
Other quests with this name
This one: Sunwell Plateau · Level 25-30.
Steps, storylines and map placement from the client’s QuestLine, prerequisite and QuestPOI data; neighbouring quest text is Blizzard’s own (quest API), shortened to its opening sentences.