Solas - Official Return of the Dread Wolf Speculation

My theory is a lot simpler: that it's an automatic response to a grievous wound. The titan it stems from may not even have any control over its spread. We don't have any proof that they think or act anything like us, after all.

just the thought that I will have to see this character again, makes me have emo issues.

This could be the case but when we are at the Temple of Sacred Ashes and Varric questions how the red lyrium got there, Solas mutters in the background that it could be the result of magic. I took from this that the enormous magical energy released during the explosion corrupted the lyrium in the mountain. Then Bianca told us that red lyrium is an organic substance infected with the Blight and in the Descent told us that lyrium is the blood of titans. Putting all these together, it seemed more likely to me that magic used by the Evanuris to subdue the Titans ultimately corrupted one of them, creating red lyrium and indirectly the Blight.

So, like the Veil, it is apparently not something natural but caused by ancient elven magic. The conclusion I drew from Trespasser is that everything bad in the world is the responsibility of the ancient elves; not something I'm thrilled about but that is the way the clues were pointing.

Except Solas specifically mentioned magic being involved, so it seems like it was more than just corrupted tissue getting mixed in with the lyrium. I missed the Solas comment first time I played the game but noticed it on my second run. At this point I knew nothing about the Titans but did know the information from Bianca. Then there are all his comments about the Grey Wardens to take into account and his discussion with Vivienne about Blight magic. Whatever caused the taint I am pretty sure the Evanuris or the Forgotten Ones had a hand in it and Solas knew way more than he was willing to divulge. It is one of those questions I would have liked to have asked but was never given the chance: "What do you really know about the Blight?"

Well its possible the original taint/blight predated the elves. In addition to the dwarves claiming that the darkspawn where 'always there' (i.e not originating from the black city) and how most red lyrium was found in ancient thaigs, there was also a reference to what they called the gangue. Basically its just describes the corruption version of the stone, and it is an occurrence that was reportedly "as old as balance". So I'd say there is enough evidence to support the possibility of the taint being a natural occurrence, or at least predating elvhen interference.

That being said, there is also a high probability that elves did meddle with it (black city, dwarven-elvhen interaction, the DAO eluvian, etc). So I'd say you have reason to hope.

It was interesting that in the book they seemed to be doing a lot of research about blood magic being used in the past and yet this could not have had anything to do with what went on in the south because in the book the HQ knew nothing about that, just assumed that Clarel had been a bit tardy about making her latest report. So clearly the leadership were investigating something that they either thought could be important or was of concern.