And because we have the worst luck, we show up to find Voldemort and Snape talking about the elder wand. He tells the snake to do something and it violently attacks Snape. We rush in once Voldemort was gone but for all the numerous items in my bag I didn't have a single Bezoar, or any antivenom potions, and we had run out of Dittany days ago. All we could do was sit and listen to him as he told Harry something. All we could do was watch someone else die.