Papyrus Event for checking global value or quest stage?

[EnvyDeveloper]

I'm making a quest mod and one of the new factions require destroying the Brotherhood of Steel to progress. They have their own additional way to destroy the Prydwen, which advances their quest.

 

I want to check for when the player destroys the Brotherhood using the vanilla factions, and for the quest objective of "Destroy the Brotherhood" to be completed in this case.

 

So that means, checking the global variable Player_BOSDestroyed or checking the quest stages of the Destroy Brotherhood quests. But I'm not sure what is the most effective way of doing this, in a quest script without modifying the vanilla scripts.

 

Any help would be appreciated. :)

[shavkacagarikia]

You can check it with BrotherhoodQuestProperty.IsStageDone() and pass needed stage number as parameter. Global variable probably is easier. Player_BOSDestroyed.getvalue(). the value probably is set to 1 after player destroys BOS