Maybe a wizard cannot be able to cast both the true patronus charm and the killing curse, because the thoughts they require are so opposed. (Does anyone remember if Godric and Rowena ever used the killing curse?) Alternately, terminally valuing death might just break Harry’s patronus in particular—the thought he uses to cast it is that nobody should die, but there might be other possible variations that don’t include that.
Maybe a wizard cannot be able to cast both the true patronus charm and the killing curse, because the thoughts they require are so opposed. (Does anyone remember if Godric and Rowena ever used the killing curse?) Alternately, terminally valuing death might just break Harry’s patronus in particular—the thought he uses to cast it is that nobody should die, but there might be other possible variations that don’t include that.
Lily Potter has a patronus, and at least attempted to use the Killing Curse in her dying moments.
I was referring to only the true patronus charm (the human version, not the animal version).
Right, sorry.