website was censored for some reason so I going to just copy and paste.
Successfully complete the indicated task to unlock the corresponding legendary weapon:
Ageless: In Orzammar before you pick a new king, click the king's throne, set three of your party members on pressure plates around the area, and use the fourth to click the throne again. Kill the dragon to get the Ageless legendary weapon.
Keening Blade: Successfully complete the "Unbound" quest. To start it, collect the journals from the following locations:
1. Adventurer's corpse in Ruined Temple on the "Urn Of Sacred Ashes" quest in the southwest corridor. 2. Brecilian Ruins' Lower Ruins in the south fire trap room. 3. Talk to an adventurer in Orzammar's Tapster's tavern. 4. Go to Denerim, then go to the dirty back alley, and fight the demon. Marjorlaneses Recurve: Successfully complete Leliana's character quest.
Staff Of The Magister Lords: Purchased it in the Wonders Of Thedas in Denerim.
Starfang Longsword: Get the random encounter with the crater, then take the Starmetal to Wardens Keep to have a one or two handed sword made.
Summersword: Defeat Loghain's general when trying to save the queen.
The Rose's Thorn: Purchased it in a shop in Orzammar.
Topsiders Honor: In Deep Roads, find the three pieces, then reassemble them in Ortan Thaig.
Yusaris Greatsword: Successfully complete the "Statue" quest on the third floor of the Magi Tower by selecting the statues in the following order: Left, Right, Middle, then the statue near the fourth floor stairs.
Wintersbreath: It can be obtained through the Warden's Keep DLC or by purchasing it at the Wonders Of Thedas.
Legendary armor Successfully complete the indicated task to unlock the corresponding legendary armor:
Blood Dragon: Use the DLC to get the first piece, and the rest will be in Bodhan's shop in your camp.
Juggernaut: Examine the three tombstones in the Brecilian Forrest to get the first three pieces. Successfully complete the "Jug" quest in the Ruins to get the final piece.
Legion Set: Pieces are spread throughout the Deeproads.
Reapers Vestment (best robe): Purchased it at the Wonders Of Thedas.
Robes Of Possession: Successfully complete Morrigan's character quest by killing Flemmeth. They can then be found in the chest in Flemeth's hut.
Wades: Wade of Wades Emporium in Denerim will make you three sets of armor, two of which will use 3x Drake Scales, and the other will need the Dragon Scale. The first two sets are leather armor, and the third is your choice of medium, heavy, or massive. You can get lots of Drake Scales and the Dragon Scale during the "Urn Of Sacred Ashes" quest. Note: Make sure you always pay the extra gold when asked to get the best results.
I only see two spoilers, one not really too big of one. And yeah, what are the stats of Ageless? Unless it's possible to get it after having a king...? I got the codex from the throne, but didn't realize that there was the quest right there.