For this achievement you will have to either travel to
Arkngthamz or find a book in Fort Dawnguard called
The Aetherium Wars read it and also take it.
When you enter inside Arkngthamz a ghost voice will keep telling you to turn back , you just keep going and soon you will meet Katria ,accept her offer to help and then the quest will begin
Lost to the Ages.Not far from where you meet Katria you will find her body and you can search her to get
Katria's Journal.
You will get to a point when Katria will say that this is where she had her fall and that her bow is at the big log there , when this happens do go and get the bow
Zephyr as you will need it if you do not have a bow on you.
You will get to a place where the
Tonal Lock will be,basically you will need to arrow hit the blue marks in a correct order ,aw and don't worry about arrows as there are plenty on the floor near the dead skeleton you can just pick some up
or if your a mage you can just fireball them as that works also.
Now if you check the Katria's Journal you can find the number 1 is the bottom left , the 2 is bottom right and the rest are trial and error but here i will list them anyway.
1.Bottom left
2.Bottom right
3.Top left
4.Top right
5.Middle
Go inside and get your 1st piece of Aetherium Shard (1/4).
Now can exit this place and travel to
Raldbthar.
Here are some bandits and after those will be falmers. You will get to a point where you will have to remove human parts from the mechanism , just have in mind that one is
underwater.
Soon after you get the 2nd piece of Aetherium (2/4).
Next location is near Mzulft called
Dwarven Storeroom North of Riften.
After you lockpick the Expert on the Door the Aetherium shard is behind it (3/4).
The last piece is at a small shrine after crossing the
Deep Folk Crossing located north-east of Markarth(4/4).
Now we going to the Forge and that's in the
Ruins of Bthalft.
Here when you do get inside you will need to either use a bow again on the 2 blue mechanism or just fireball them to open the door.
Defeat the guardians and then you can craft 1 item out of 3 :
Aetherial Crown : 2 Flawless Sapphire
2 Dwarven Metal Ingot
2 Gold Ingot
1 Aetherium Crest
Aetherial Shield : 4 Dwarven Metal Ingot
2 Regined Malachite
1 Aetherium Crest
Aetherial Staff : 2 Dwarven Metal Ingot
2 Ebony Ingot
1 Gold Ingot
1 Aetherium Crest
Now while you are looking at the forge turn right and go to the table , there's a chest on the table and inside are all the materials you need.
Take them all and craft what you will like , after that you talk to the ghost and achievement pops.
Good luck and enjoy Skyrim on the One
.
EDIT: Skuller 101 mentioned that ''if you enter Mzulft or Raldbthar before accepting this quest the quest will glitch and not start''
EDIT: Not sure why the negative so please do leave a comment if something is missing and ill adjust the guide thanks!.