Board Thread:Questions and Answers/@comment-21107207-20140321004201

Looking back, her attack doesn't make much sense. Phillipa admitted that she didn't even know Saskia was a dragon until after she was poisoned (plus, it was the 'antidote' that spellbound her). There's also the matter of the Lodge not ordering Foltest's death. And, considering her personality, she doesn't seem like the type to randomly attack a castle siege.

I think I remember Geralt theorizing that the dragon might have felt threatened by the battle, but even then, why go after Geralt and the king?  