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^ Not so. This basically sounds like the item/skill equivalent of Plot Tailored to the Party, so I'm going to suggest It May Help You on Your Quest. Or maybe Someday This Will Come in Handy.
Edited by SolipSchismEdit: Found it! them!:
Cardboard Obstacle (probably the one you want), Ability Required to Proceed, Video Game Tools
Also It May Help You on Your Quest and Plot Coupon That Does Something.
Edited by rodneyAnonymous Becky: Who are you? The Mysterious Stranger: An angel. Huck: What's your name? The Mysterious Stranger: Satan.

Do we have a trope for when, in video games, you only come across skill-specific obstacles after you've learned how to use the related skill?