Shadoweave Tailoring

Shadoweave Tailoring is one of the Tailoring Specializations you are able to choose in Shattrath City.

Shadoweave specialization allows you to create two units of Shadowcloth and Ebonweave instead of one using the same amount of materials and grants access to Shadoweave Tailoring specific recipes. This specialzation is geared more towards warlocks, frost mages, and shadow priests.

Becoming a Shadoweave Tailor
To specialize in Shadoweave tailoring, a character must complete, given by in Shattrath City. To obtain this quest you need to have 350 proficiency in Tailoring, and be ready to travel to Shadowmoon Valley. You need to be at least level 60.

The quest requires you to travel to the Altar of Shadows and attune a crystal to it, then travel back to Shattrath City to complete the quest.

The Altar of Shadows is located inside the Netherwing Pass, a valley in the cluster of mountains in the southeast corner of Shadowmoon Valley. The pass begins in the middle range of the mountains (coords 62,63) and the Altar is on the edge of the cliff, directly south (coords 58,71).

You don't need any mats to complete the quest, and it won't start the cooldown on Shadoweave crafting. Immediately after completing the quest you may travel back to Shadowmoon Valley to craft your first two pieces of Shadowcloth.

Changing Specialization
Since patch 2.1.0, you may now re-specialize. It will cost to unlearn the current specialization, and  to learn the other specialization.

Crafting Shadowcloth
Crafting Shadowcloth is not exclusive to Shadoweave Tailors, but the specialization will always produce 2 pieces of Shadowcloth with the mats for a single one.

The materials are:

To craft Shadowcloth, the tailor must stand at the Altar of Shadows, located in Shadowmoon Valley. After crafting, the tailor will receive a "Shadowy Fortitude" buff which provides +25 stamina for one hour.

The cooldown on the crafting is 92 hours (nearly 4 days), but it's not shared with the cooldowns on the other types of specialized cloth, namely Primal Mooncloth and Spellcloth.

Note: As of Patch 3.0.8 there is no longer a cooldown on Shadowcloth.

Exclusive Patterns
Shadoweave Tailoring gives exclusive access to the following patterns:

Right before WotLK hit stores a patch was released which made the Frozen Shadoweave Set bind on equip (BoE) and only usable by shadoweave tailors.

The patterns can be obtained from, after you have completed the specialization quest.

The Frozen Shadoweave Set was arguably the best Frost Mage/Warlock/Shadow Priest equipment attainable before the 25-man raid instances. It nicely complements either Spellstrike Infusion (+), or the Battlecast Garb (+), because they use different equipment slots.

Material cost to construct Frozen Shadoweave set
To make the complete set you'll need: