Cheese the Freeze (25 player)

All raid members must avoid every Flash Freeze by standing on Snowdrifts or near Toasty Fires.

Snowdrifts are spawned after an Icicle fell on the ground.
The Toasty Fires are cast by the mage adds and are consumed whenever Flash Freeze is cast.

Found this helpful hint on stratfu:

On Hodir, sometimes you can be frozen when in a snowdrift because the game decided you moved "into" the snowdrift rather than "onto" it. Do a quick jump when you get on a snowdrift and it should make you less likely to be frozen.

Still unconfirmed if you can get this with the 'Fake Flash Freeze' bug. For those that do not know this bug, some people will have an Ice Block formed around them as if they got frozen, but the server will correct itself (since you are legitimately standing on a snowdrift) and will free you. This usually happens if you get on the Snowdrift right as it forms, since the geometry hasn't formed and the Flash Freeze seems to auto-use anyone that is at ground-level from the boss.

just to confirm, I got fake frozen tonight (as well a few others) and we still got the achieve. just to put any concerns to rest :)