Ancient Portal: Dalaran

Copied from Uroon's post on the page for Ancient Tome of Teleport: Dalaran

Summary of how to get this:

• 
  
• Fly to Scarlet Halls (right hand instance). Normal mode.
• 
  
• (Optional) Grab 2 quests inside: Just for Safekeeping, Of Course & Rank and File
• 
  
• Slay everything (at least 50 for the quest).
• 
  
• Make sure you kill the final boss (Flameweaver Koegler) fast and stand infront of him to block him burning his books.
• 
  
• Hand in 2 quests.
• 
  
• Loot book from the shelf just inside on the right. (If you look backwards towards the door, it's just on the left)
• 
  
• Learn Ancient Teleport: Dalaran.
• 
  
• Go to regular Dalaran
• 
  
• You can now buy one copy of Ancient Tome of Portal: Dalaran from Endora Moorehead (in the room to the left of the Violet Citadel steps).
• 
  

Now you're killing with portals.

This spell allows a mage to make a portal to Dalaran Crater-- i.e. Dalaran's old location. It's essentially an out-of-date GPS map.