Quote Originally Posted by Koujiro View Post
Only those of Ishgardian origin can become dragons after drinking of dragon blood (and a specifically prepared dragon blood, mind you), because only them descended from one of the Knights Twelve (they gained this ability, and thus all their descendents, because they gouged on Ratatoskr's eyes). Given that our character is not an Ishgardian, we don't have the ability of transforming, even when drinking dragon blood, so I believe it's quite safe (although heretic) to do so.
Now here's something interesting. Just how long did Nidhogg wait to get his revenge on the knights and King Thordan? We know that there were only four survivors from among the Knights Twelve, and presumably only offspring produced AFTER consuming Ratotskr's eyes would be imbued with dragon essence, right?

So, either all the Ishgardians are descendents of those four knights, or Nidhogg gave the King and the Twelve plenty of time to pump out some kids before going medieval on them...