Corthos
Great Old One
Honestly, there's just too many videos from too many sources for ISIS to be some kind of puppet, IMO. Hell, I had a friend who was a Marine sniper who told me stories of things he saw over in Iraq. Same with my brother in law., except he was in Afghanistan... Granted, Afghanistan and Iraq are not Syria, but some of the things they described were very similar to the videos I've watched about ISIS...