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Icy What You Did There
Defeat Telash Greywing after using Icy Devastator 12 times on an Icy Crystal to create a Very Icy Crystal in The Azure Vault on Mythic difficulty.
Icy What You Did There is a 10-point achievement earned by defeating Telash Greywing in The Azure Vault on Mythic difficulty after applying Icy Devastator to the Icy Crystal 12 times to transform it into a Very Icy Crystal.
Enter on Mythic Difficulty
Set the dungeon to Mythic difficulty before entering The Azure Vault. This achievement does not function on any other difficulty.
Locate the Icy Crystal
Before or after pulling Telash Greywing, identify the blue floating crystal near the edge of the boss ring. The crystal is not clickable or targetable at first, but becomes a named, mouseover-able unit once Icy Devastator has been applied to it.
Bait Icy Devastator onto the Crystal
Stand on top of the Icy Crystal so that when Telash Greywing casts Icy Devastator, the channel ticks hit the crystal. Each cast of Icy Devastator has 4 ticks, meaning the crystal can absorb up to 4 stacks per cast, allowing the achievement criteria to be met in as few as 3 full casts.
Track Crystal Transformation Progress
The crystal progresses through the following stages as it absorbs ticks: Icy Crystal, Slightly Icy Crystal, Somewhat Icy Crystal, Moderately Icy Crystal, and finally Very Icy Crystal. Once it reaches Very Icy Crystal, it displays a chilled snowflake-like aura, confirming the criteria are met.
Defeat Telash Greywing
Once the crystal has become a Very Icy Crystal, defeat Telash Greywing to complete the achievement. The achievement tracker will shift from red to white when the crystal criteria have been satisfied.
Tips
Icy Devastator is cast after Frost Bomb, and frozen ground from Frost Bomb spreads quickly — prioritizing crystal stacking over avoiding frozen ground and using Heroism or Bloodlust on healers during this phase can help complete the crystal faster.
Avoid blanketing the ground in ice from Frost Bomb near the crystal, as this can make positioning on the crystal more difficult.
If Icy Devastator appears to cast but produces no effect, facing away from Telash Greywing may increase the chance of the ability connecting, particularly at higher character levels where the spell can miss.
See the video guides linked for a full visual walkthrough of the crystal positioning and fight execution.