The Elder Scrolls V: Skyrim Special Edition

I had a hard time with this. Kinda never knew that I had to use the shout at the ground to actually summon him.

I'll mention that in the guide

Perfect guide, surprised how easy this is. +1, thanks.

After the first battle, when I was leaving The Boneyard, when I saw him on the perch, I attacked and killed him. Make sure that you do not kill him, let him talk to you, or it makes the achievement unattainable.

What is his summoning shout called, I don't have it

Sneaky - I'm pretty sure it's just called Summon Durneviir.

Yeah, it is. Thanks

What idiot thought you meant wait an hour in real time?
As soon as I read it I knew what you meant.

I dont have the shout and I'm pretty sure that I killed him, dozens of ingame hours ago so I guess I'm screwed for this one.

I have an early save but I don't fancy playing all the way through the Dawnguard quests again just for this. That whole Soul Cairn section was interminably dull.

I have all three words unlocked and have used the shout but no achievement. I even got the words of power achievement unlocking all 3 words.

Stupid question, but can you earn this achievement if you never did the mission that spawns dragons in the world? Aka I have no dragons and no souls.

Been a very long time, but I assume no. I recall you needing to use a Dragon soul to be able to unlock the word for use once you found it in the world. Assume no, but someone else may know more.

You could still find all the words and progress the main story to spawn dragons, then just use the souls as soon as you get them

if you want this achievement do not summon dunheviir in the soul cairn will block you from getting it on this playthrough happened to me so
I have to do a new playthrough for my last achievement sadly

One item to add here. I did this a few times and the achievement would not pop after learning the 3rd word. I found that even though the game was showing me learning the second word, Dunheviir would vanish the moment he appeared. To fix this, I went back to a save prior to learning any of the words and fast travelled to the plains outside of Whiterun. Call Dunheviir once to learn the first word, then save, skip 24 hours ahead and move a short distance to another area of the plains. Make sure that you don't see any dragons in the air or ground before calling him again. If he vanishes right away, go back to your save. If he gives the second word and flies off, save, forward 24 hours, move to another area of the plains outside Whiterun, and do it again. Once he was done with the third word and flew off, the achievement popped. Good luck! If this happened to you, hopefully you still have a save after you met Dunheviir but before you learned the words without getting the achievement.