Where can you get the amulet to give to the girl in the windmill? I read it is in the crypt but where I'm not sure where-thanks. (Is the elixir necessary to kill serpent queen? Having hard time with her, got Xydussa though)

The amulet was in a treasure chest in one of the first few rooms in the Crypt I believe. The Elixir is supposed to put the Naga to sleep. I never used it.