User blog comment:Skeith9/Heroic Spirits Speculation/@comment-6432165-20140717023235/@comment-24754018-20140717033443

Far too tired to consider this in any depth, but links that may be of interest (though chances are you have already read a few of them, since they are a single google away): http://www.vortigernstudies.org.uk/artwho/who.htm  (A consideration of the different accounts of Vortigen, along with some opinions) http://www.pitt.edu/~dash/merlin.html  (Short legend involving Merlin and two snakes representing Vortigen and the Saxons) And I'm sure that Wikipedia should have something to say, but I appear unable to access it at the moment. I suppose King Arthur has some sort of connection to Vortigen, what with them both meeting Merlin and having to fight off invading barbarians. It would explain the allusion to Vortigen with Saber Alter. But like I said, rather tired, so this weary head may be stretching things. Vortigen could be quite interesting as a Servant, and the differing accounts leave you a few different ideas to utilise, I suppose.