Lesson: Tier 4 Metal Extraction

 was an extraction lesson. Extraction is no longer available and it was replaced by dismantling. This item is no longer usable.

Legacy
Using it enables the character to extract smithing materials from Tier 4 gear. In order to use this, the character must have already learned Lesson: Tier 3 Metal Extraction and all previous lessons.

Source

 * Merchants
 * Dropped by mobs