It's in the title. We have loads of Talismans and challenges that are to do with
reducing the number of skills used in a level. How about one which encourages the player to think about how
every skill can be used as part of a solution?
Since it's a Talisman, troll levels with 99 of everything wouldn't be an issue, since Talismans can be ignored anyway. Plus, it could be so that, if a designer adds an infinite skill to the level, this Talisman does not apply (either at all, or just to that skill) and could be greyed out as an option in the Editor.
Most importantly, it's another way to enforce a solution without (necessarily) disrupting the layout of the level.
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Full disclosure: I have a feeling I
might have suggested this, or something similar, previously. My memory for these things isn't always that great, since I have
lots of ideas and don't always keep track of them! Many apologies if that's the case, admins please feel free to move/merge/delete this topic accordingly