I believe there is a bug with 'Galawain's favor' (buff) that you are supposed to recieve when you choose to fight Scvorielaphas, but it is instead given to the dragon. With how the dialogue is presented, it heavily suggests you are to be its recipient due to your loyalty to Galawain before.  I imagine this might be rather obscure as there are PoE1 conditions to gain this, of which I assume is that you needed to have chosen to strengthen the souls of the Dyrwood - and the fact that you must choos