Ancient Teleport: Dalaran

Summary of how to get this and the Ancient Tome of Portal: Dalaran:

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• Fly to Scarlet Halls (right hand instance). Normal or Heroic mode.
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• Make sure you kill the final boss (Flameweaver Koegler) fast and stand infront of him to block him burning his books.
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• Loot book from the shelf just inside on the right. (If you look backwards towards the door, it's just on the left)
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• Learn Ancient Teleport: Dalaran.
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• Go to regular Dalaran
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• 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) - though if someone has bought it recently, you might need to wait up to an hour for her to sell it again.
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This spell allows a mage to teleport to Dalaran Crater-- i.e. Dalaran's old location. It's essentially an out-of-date GPS map.

Obtained in Scarlet Halls by making sure to have a player stand in front of all book burner casts on the last boss. It's in a tome on the shelves.

Takes you to Dalaran Crater in Hillsbrad.