Thunderfury, Blessed Blade of the Windseeker
Thunderfury, Blessed Blade of the Windseeker is the legendary sword once wielded by Thunderaan, Prince of Air. The prince, son of Al'Akir the Windlord, was attacked by Ragnaros the Firelord, in an attempt to heighten the already impressive power that the fire elemental held. Ragnaros succeeded; however, Thunderaan's power could not be completely taken into his form. What remained of Thunderaan was placed in a talisman of elemental binding, which was broken into two pieces. The pieces were then given to the Firelord's two lieutenants, Baron Geddon and Garr, respectively the left and right halves. These two halves are known as the Bindings of the Windseeker.
Frist things first
Thunderfury, is obtained after doing a quest line. This quest line is started once you obtain ONE of the Bindings of the Windseeker, either of them is enough but to complete the quest line you will need both. The Bindings of the Windseeker are dropped from Baron Geddon or Garr.
Warning: The drop rate is of 3-4% for both of the Bindings.
Starting the Quest line
Once you have in your power one of the Bindings you shall go to Silithus and speak with Highlord Demitrian. He will give you Vessel of Rebirth that is the item that will start the quest line for Thunderfury.
Thunderaan the Windseeker
After you have started the quest line, Thunderaan the Windseeker is the following quest you will need to do. This part of the quest might be EXPENSIVE and time consuming because of the materials needed to complete it.
10 Elementium Bars
These are the materials needed to create all of the Elementium Bars (you have to consider each bar needs 10 arcanite bars didn’t list them bellow but counted the materials needed for each one):
100 arcane crystals
100 thorium bars
10 elementium ores
30 elemental flux
10 fiery cores
To smelt all this and get you Elementium bars, you must clear BWL up to Ebonroc; after you kill all the trash before Ebonroc you are left with Krixix, get a priest to mind control him and he will teach you to get elementium bars.
Essence of the Firelord
This is dropped by Ragnaros and is a 100% drop so shouldn’t be frustrating to get
The 2 Bindigs of the Windseeker
Baron Geddon’s Binding
Garr’s Binding
The last step before your reward
Hand in the materials to the Highlord Demitrian and Thunderaan will be summoned, he will drop Dormant Wind Kissed Blade give this to the Highlord and you will finally get Thunderfury!