• Lightweave Embroidery
• 4 second cast
• Requires Cloth, Leather, Mail, Plate
• Reagents:
  [Moonshroud], [Eternium Thread]
• Embroiders a subtle pattern of light into your cloak, giving you a chance to increase your spell power by 295 for 15 sec when casting a spell.
  
  Embroidering your cloak will cause it to become soulbound. Requires 400 Tailoring to use.
• Requires Tailoring 400

Permanently enchant a tailor's own cloak to give a chance to increase spell power when casting.

Source

Taught by a tailoring trainer for 12 50. Requires 420 tailoring skill to train.

Materials required:

1x [Moonshroud]

1x [Eternium Thread]

Patches changes

Patch 3.2.0 (04-Aug-2009): Changed to increase spell damage by 295 on proc, lasts 15 seconds.
            As of 5 Aug 2009, the additional 45sp only applies only to damage; this may be a bug.
Patch 3.1.0 (14-Apr-2009): Changed to increase spell damage by 250 on proc, lasts 15 seconds. 
/ Patch 3.0.2 (14-Oct-2008): Added. 

External links

• Wowhead
• Thottbot
• WoWDB