An issue came up in a recent adventure session whereby I as a ranger managed to hit an ancient red shadow dragon with a greater arrow of dragon slaying only to be told that it was immune to any effects the arrow might have had...Needless to say we as a group had a nice long discussion about it and I accepted the GMs arguement that tough, I did no damage as the arrow needed to be attuned to undead slaying. (I killed the wyrm in the next round anyway).
Does this seem correct as I still find it strange that a dragon is immune to arrows of dragon slaying.
