I don't understand what was up with Talana too. How the heck did Ygerna control a *Dragon Knight* (supposedly the most powerful creatures on earth after Dragons) from within the Hall of Echoes? Same goes for the crystal thingie... apparently it is so very easy to curtail a Dragon Knight (Damian didn't even know about it, lol).
Not to mention, what was up with Lovis? Did she control him too?
As for Damian, the Divine mentions that Ygerna living is Damian's invincibility... well I don't see the point... he was already nearly invincible anyway since he was the reincarnation of the Dark One.
Maybe one of the Larian writers could explain it a bit more here? (pretty please...)
