• Study of Advanced Smelting
• Item Level 70Disenchants into:
  Not disenchantable
• Binds when picked up
• Requires Mining (375)
• Use: Teaches you how to make Hardened Khorium.
• [Hardened Khorium]
• 1 (Expendable) Charges
• Sell Price: 2
• 3 sec cast cast

Source

Random drop in Sunwell Plateau.

Teaches

• Smelt Hardened Khorium

Notes

• This is one of the only two blueprints used in mining. The other one is [Goblin's Guide to Elementium].

External links

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

Patch Changes

Patch 2.4.0 (25-Mar-2008): Added