I see.

[He turns around to look at her. It's the same old Ling. A year older, but otherwise the same as ever. He wears a serious expression.]

Before you get any ideas, you should know it's pointless to try and attack me. While your alkahestry may give you an advantage over me, the philosopher's stone cannot be simply taken away from me. Even though you might think there will be ample opportunities while we are here.