Agreed ...
It would require recreate whole world ... it would be odd if some events would have timer, and others would be waiting there for our arival ...
If you would like to add some sence of time to this game, it would need to apply on whole world, not just some quests. :-/
That would be odd.
you can still save the Tieffling, you can still side with Minthara to kill the Tieffling,...
You cant ...
Since when ritual is completed, every Tieffling in the Grove is dead (just as Kagha said it will be) ... those thorns that is suppose to defend the grove is not growing only over that little greeny part down bellow, they are growing over the gate itself.
Oddly enough, if you decide to kill Goblin leader, but fail to save (or more likely betray Halsin, since there is no way he would not survive that fight without you helping goblins) Halsin, Kagha keeps talking about that they will complete the ritual, yet Druids stop casting ... you are allowed to go in and out without any restrictions, Druid vendor even gives you good reputation since you helped them ... and you have no way to tell anyone that Kagha sided with Shadow druids, except Kagha herself, and she dont care that you know.