2020

• Glyph of Death Coil
• Item Level 25Disenchants into:
  Not disenchantable
• Major Glyph
• Classes: Death Knight
• Requires Level 25
• Use: Permanently teaches you this glyph.
  Your Death Coil spell is now usable on all allies. When cast on a non-undead ally, Death Coil shrouds them with a protective barrier that absorbs up to 1133 + 0.514 * AP * 1 damage.
• Sell Price: 1

Source

This item is created with Inscription (275).

Materials required:

3x [Shimmering Ink]

1x [Light Parchment]

Patch changes

• Patch 5.0.4 (28 August 2012): Changed from Increases the damage or healing done by Death Coil by 15%.; changed from prime glyph. 
  
• / Patch 4.0.1 (12-Oct-2010): Added. 
  

External links

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