No killing curse spell unlocked after completing the side quests and the main story line

[insomniacdreamers5]

I had completed the story line and side quests . i chose a different dialogue scenario missing the opportunity to unlock the killing curse spell. Even after completing all the quests , i couldn't unlock the spell. is there any other way to unlock the spell despite completing all the missions.

[Dreadstone]

1) Check your mail


The Killing Curse comes at the end of the Sebastian questline. If you haven't completed that, you won't get the spell.

[Raziel]

If you didn't let Sebastian teach you, I don't think you can learn it again.

[Ael]

No

[SooperDoop]

If you finish the Sebastian quest line and choose not to learn the curse from him, fear not. After completing the main story line he will ask to speak with you in the undercroft. After he babbles a bit and thanks you, speak to him again. You can learn any curse you have chosen not to learn from him earlier.

[AndroidQueen]

even when he gets expelled?

[Alhanalem [DD1 Community Dev]]

There is no second chances to learn the unforgivable curses, if you decline to learn the spells, you can't get them later.

There is basically no downside to learning them so just do it. If you cast them in front of NPCs they'll give a negative reaction but that's about it. it won't affect the story or the ending, which is more than I can say about the quest <spoiler> with the business man in hogsmeade who wants you to steal a plant from someone else in town. Even if you don't steal it and just give him any random plant, and you never enter the guy's house, Sirona will comment afterwards that she heard about you breaking into their house, which is about the only time the game gives any consequence whatsoever for a morality decision.</spoiler>

My apologies, i have no idea how to do spoiler tags apparently. Will fix if someone tells me how