Yeah, bear in mind that while you're "trashing" cards, you're getting cards given right back to you. Now, the best case scenario (which I just played today), is when your opponent ignores Ambassador. My opponent ignored Ambassador, but did get a couple Familiars, but I was able to just throw his Curses right back at him. Then Potions. By the end, I was throwing extra Silvers at him, as they were getting in the way of my Platinums. He couldn't do anything, and all because he didn't open Ambassador.