Took the Red Eye Down

Took the Red Eye Down is one of the achievements in Glory of the Legion Raider, complete the Glory of the Legion Raider, you will get the mount Grove Defiler.

1. Defeat Il'gynoth in The Emerald Nightmare after inflicting 20 Nightmare Explosions on the Eye of Il'gynoth within 10 seconds on Normal difficulty or higher.
2. You need to provide your account. 
3. Your character's item level should be 45.
4. ETA: 1-3 CDs.