User blog comment:Swampman/SPOILERS----- Arisen Timeline/Speculation/@comment-75.112.131.72-20120704162357/@comment-5181752-20120704181629

We know savan wasn't the last to slay the dragon for fact. Grigori killed the previous dragon before him and failed to win against savan. Thus having him being the dragon reincarnate. Also the dragon forged, his eternal bidding until somebody slays the dragon is to guide the other arisen. So yes, savan wasn't the last to slay the dragon, just the last to slay the dragon, and take over as seneschal.

Side note : for all we know, quince could be grigori's pawn.