Side note: what characters have been seen to cast both Patronus and AK? Snape does it in canon I think? Does he ever cast his Patronus after he kills Dumbledore?
Yes, in book 7 he used his patronus to lure Harry to the lake where he left Gryffindor’s sword.
Yes, in book 7 he used his patronus to lure Harry to the lake where he left Gryffindor’s sword.