You most certainly can buy the same spell twice! You can buy the magic upgrade, then you can purchase the whole spell for the same thing. I am trying to help you fix the interfaces to work for better playability. I am looking for an improvement here. Many of you see have a high tolerance for issues, because you are maybe used to them. I seek user interface improvements, and I do appreciate your criticism of my ideas.
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When I dig alone -- I prefer to be by myself