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Glory of the Draenor Raider is an achievement, reward of this is Gorestrider Gronning. You’ll obtain it, if you can overpower following 17 achievements from Draenor raid:
Flame On!;
More Like Wrecked-us;
Brothers in Arms
Lineage of Power;
He Shoots, He Ores;
Fain Would Lie Down;
There’s Always a Bigger Train;
Would You Give Me a Hand?;
Ashes, Ashes…;
Hurry Up, Maggot!;
A Fungus Among Us;
Pair Annihilation;
The Iron Price;
Stamp Stamp Revolution;
The Steel Has Been Brought;
Ya, We’ve Got Time;
Be Quick or Be Dead
Here you can buy "Glory of the Draenor Raider" for EU or US Servers. Also you'll get guide for completing "Glory of the Draenor 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.