The Deathchill Cloak is crafted with Tailoring (420); taught by Dalaran tailoring trainers only after the achievement  [Loremaster of Northrend] is completed.

Materials required:
Inv fabric frostweave imbuedbolt.png 5x [Bolt of Imbued Frostweave] Inv elemental eternal fire.png 6x [Eternal Fire]
Inv elemental eternal shadow.png 4x [Eternal Shadow] Inv misc gem pearl 11.png 1x [Siren's Tear]
Spell frost frozencore.png 1x [Frozen Orb]

Patch changes

External links