The Dink Network

I came back from the crustacean-woman, talked to the wizard (twice > "what is the best way to kill red scorpions?"), I went to the potion lady and ask her about the location of the scorpions, the same with the hay-seller. I then go to the place where I entered this level (after talking to the women downstairs), kill 3 scorpions (I also tried to kill all 5), then go back to the wizard but nothing has changed the only question I can ask is "what is the best way of killing scropions".

Do I miss something here? I tried to kill them with different weapons too, but I never got a reaction. How do I drink their blood? I tried to stand over their remains and hit the space-bar, but no reaction there either.

Thanks for your help