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The Ny’alotha, the Waking City raid gets you the opportunity to obtain the achievement Glory of the Ny’alotha Raider. You need to run this raid in Normal difficulty or higher. Requirements include the completion of twelve achievements:
Smoke Test (You need to defeat Wrathion after defeating 10 Crackling Shards within 3 seconds of each other*)
Phase 3: Prophet (You need to defeat the Prophet Skitra after defeating three Disciples of the Prophet*)
Realizing Your Potential (You need to defeat the Hivemind after defeating 3 Evolved Specimen*)
Temper Tantrum (You need to defeat Drest'agath after triggering Throes of Agony twice within 60 seconds*)
How? Isn't it Obelisk? (You need to defeat Ra-den after destroying 2 obelisks with Unstable Void*)
Cleansing Treatment (You need to defeat the Carapace of N'Zoth after defeating all Synthesis Growths within 10 seconds*)
Mana Sponge (You need to defeat Maut after defeating a Forbidden Manifestation*)
Buzzer Beater (You need to defeat Dark Inquisitor Xanesh after safely eliminating a Void Orb with less than 3 seconds remaining on Voidwoken 3 times*)
You Can Pet the Dog, but… (You need to defeat Shad'har the Insatiable after having everyone /pet him*)
Total Annihilation (You need to defeat Vexiona after allowing every player to be hit by Annihilation at least 30 times*)
Bloody Mess (You need to defeat Il'gynoth, Corruption Reborn after defeating 10 Bloods of Ny'alotha in under 3 seconds*)
It's Not A Cult (You need to defeat N'Zoth the Corruptor after all players have accepted the Gift of N'Zoth*)
Here you can buy "Glory of the Ny'alotha Raider" for EU or US Servers. Also you'll get guide for completing "Glory of the Ny'alotha Raider" and can help your friends with these hard quests.
It is a rather harder that it may seem, and we are there for you to do your game process easier.
Rewards include the achievement Glory of the Ny’alotha Raider, epic mount Wriggling Parasite; also you have an opportunity to obtain gear and gold.