A Good Eye-dea

For this achievement you must not move while N'Zoth's eye is open. This achievement is personal, and you cannot get it while you are dead.

N'Zoth's eye opens when Uu'nat casts Gift of N'Zoth, so stop moving completely when the boss gets close to 90 energy. You must NOT move until N'Zoth eye closed, which happens around 40 energy. The eye is also open during the transitions.

The tracker currently doesn't work (it doesn't go red if you fail it), so avoid jumping or using abilities such as [spell=152175] and Blink, as they might fail the achievement.

Tried this achievement with a friend on both normal and heroic difficulty, and we oneshotted the boss, but got no achievements.
Tried again as 3 on mythic, but this time we slowly dpsed the boss down until the eye actually opened. Then we stood still, did nothing, until the eye once again closed.

I think that if you wanna be sure to get this achievement, at least make the eye open at least once. That worked for us at least!

Better than nuking him down and getting no achievement.

TLDR: Wait for eye to open, then don't move. Then nuke the boss.

Easy Solo for Level 70 Dragonflight, Level 80 Worldsoul Saga, and beyond...

1. Normal Difficulty.

2. Run near boss. Stop moving. Begin fight.

3. Nuke boss and do not move. At all.

4. ?

5. Profit. Achievement Completed.