Legendary Heavy Armor Locations
Dragonbone Cuirass- Found in Mudan, Lost Dwemer Checkpoint, Mudan Grotto, on a tiny island off the southwest coast of Ebonheart.
Lord's Mail- Kill the refugee in Ebonheart's underground stream. You can get there through the imperial commission.
Wraithguard(R)- This will be a gift from Lord Vivec himself! It has to do with the main quest.
Wraithguard(L)- To get this, you must first get Kagrenac's Journal and Planbook from Endusal and Tureynulal. Next, you need to kill Vivec and loot his body for the Wraithguard (incomplete). Then, you need to take it to Yagrum of the Tel Fyr Corpusarium. He will give it back to you, but be warned, it permanently saps you of 200 health, despite you wearing it or not.
Left Fist of Randagulf- Found in Illunbi, near of Khartag Point. It's behind a cart where you fight Dagoth Gares.
Right Fist of Randagulf- Found in Illunbi, next to the Left fist.
Ten Pace Boots- Found in Bal Fell, ina chest at the lowest level.
Auriel's Shield- Found on a Bouyant Armiger in Ghostgate, Tower of Dawn.
Azura's Servant- Found in the Northeast Tower in Tel Vos, behind a hidden door.
Darksun Shield- Kill the Vampire slayer at Ald Ruhn for the Vampire Clan Aundae IN THE DAY.
Spell Breaker- First, become a Vampire. Next, you must travel into Red Mountain into Salvel Ancestral Tomb. Find a vampire named Mastrius laying on the ground. He'll get up and for a mission, send you to get the Spell Breaker. It's in Bthuand, which is far west of Tel Vos. Find it laying on the ground and bring it back to Mastruis only to have him attack you with it. Kill him and claim it as yours.
Helm of Graff the White- Finish enough quests for Frald the White in the Imperial Legion and you'll get it.
Mask of Clavicus Vile- Kill Sorkvild the Raven, in his tower right next to Dagon Fel.
Helm of Oreyn Bearclaw- Talk to the Statue of Malacath in Assurdiripul (west of Sanctus Shrine). He will ask you to slay the last Bearclaw descendant. You can find him and two bodyguards near Gnaar Mok near some dead Bull Netchs. Kill him and talk to the shrine again and get your reward.
Bloodworm Helm- Kill Crazy Batou in Maren Ancestral Tomb. It says he's part of the main quest, but I never used him.