Glory of the Cataclysm Raider is one of the BfA achievements that can be available for you after completing 24 Cataclysm raid achievements. Also this achievement will get you the opportunity to obtain flying mount - Reins of the Drake of the East Wind. Here is the list of necessary raid achievements:
Heroic: Magmaw; Heroic: Maloriak; Heroic: Chimaeron;
Heroic: Halfus Wyrmbreaker; Heroic: Ascendant Council; Heroic: Conclave of Wind;
Parasite Evening; Silence is Golden; Aberrant Behavior;
The Only Escape; Elementary; Stay Chill;
Heroic: Omnotron Defense System; Heroic: Atramedes; Heroic: Nefarian;
Heroic: Valiona and Theralion; Heroic: Cho’gall; Heroic: Al’Akir;
Achieve-a-tron; Full of Sound and Fury; Keeping It in the Family;
Double Dragon; The Abyss Will Gaze Back Into You; Four Play
We’re providing Glory of the Cataclysm Raider offer both for EU and US servers.
Also you'll get guide for completing Glory of the Cataclysm 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.