I have just initiated three members into the blades and Esbern gave me my first quest with them to go and 'Kill the Dragon in Skyborn Altar' but I have already killed that dragon and so when we show up there is no dragon to kill.
I have tried using resetquest BQ04 in the console (BQ04 is the quest ID for the Jarls bounty to kill the Dragon at Skyborn Altar) however this does not work and there is still no dragon there. I do not know the quest ID for this specific quest and haven't seen it online but if I had it I could probably just use the setstage command to get past this bug.
Does anyone know what it is or know how I can find out?
Best Answer
The altar dragons actually respawn, it just takes some time. Perhaps do some fast traveling, or use Wait (but not at the altar). Many reports are that re-spawning takes 30 in-game days, but I've had locations take only 10.
I just tested Skyborn Altar. 10 days was sufficient for the dragon to respawn. I find it fastest to look at the date on the map screen at bottom right, add 10 for your target, and fast travel the longest distances to pass time. Markarth<->Riften is ~26 hours.
From my experience if you arrive too early you will have to wait all over again, better to load back before the arrival.