My opponent casts shatter on my lucky charm, I then play hydra spell to shatter his bag of holding, if he casts reflection, can he then shatter another of my items instead of me shattering one of his? I'm inclined to think I'd be out two items in this situation, but some in our group are undecided
Also, if I do shatter his bag of holding, does he have any window of opportunity to move items around? What if I take his bag with tricks or treats? Can he empty the bag before I take it?