Rogue guide to achieving 'Intense Cold'

The Intense Cold achievement is done in heroic Nexus and is on the last boss Keristrasza. To do this you have to prevent the Intense Cold debuff to stacking to more than two. Normally this isn't a problem as movement will cause the debuff to be removed. However the Crystal chains which you get hit with stop you moving for 10 seconds and can be enough to ruin your attempt.

So if you need to have this on your rogue here's how I managed it in a heroic pug.

Positioning: Like pretty much all dragon bosses in game you want to stay away from the head and the tail as there are cone based attacks around this area. So stick yourself facing the ribs and you should be safe from those attacks.

Movement: A simple jump is enough to remove the debuff so that's all you need to do every time Intense Cold gets applied.

Chains: The first time this gets applied use Cloak of Shadows, the second time Vanish. After this unless you're combat spec'd with Improved Sprint you'll need to hope your dps is high enough to take the boss down before you get chained again. A sub rogue could also use Preparation to reset the necessary cool downs, but as a HfB/Mutilate rogue I was left with just the two and a lot of praying.

Don't be disheartened if you don't manage it the first time you should hopefully running this instance a few times for the chest piece and the trinket. (I have yet to see the trinket drop but the chest piece has dropped every time).

Good luck