• Plans: Nightfall
• Item Level 70Disenchants into:
  Not disenchantable
• Binds when picked up
• Requires Blacksmithing (300)
• Use: Teaches you how to make Nightfall.
• [Nightfall]
• Requires 8x[Lava Core], 5x[Fiery Core], 10x[Arcanite Bar], 12x[Dark Iron Bar], 4x[Huge Emerald]
• 1 Charges
• Sell Price: 3

Source

This item is sold by Lokhtos Darkbargainer in Blackrock Depths for 12. You must be Exalted with the Thorium Brotherhood to buy it.

Patch changes

• Patch 1.6.0 (12-Jul-2005): Added. 
  

External links

• Battle.net (EU)
• Wowhead
• Thottbot
• WoWDB