If you don't mind, questions like these are best for the main Thread, since it keeps all the discussion in one place (not to mention, someone smarter than me might answer your question.
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That being said, not sure exactly what you mean... But most likely 'no'; you should be designing & coding your own spells. Now, like I said, if you're tossing ideas around & come up with a cool one with some friends, or if you code the spell & can't seem to find this one game-breaking bug (& then getting some help finding it)... Well as far as I can tell that's all a part of the community involvement. Still, the Hero (it's design, spells, theme, role, etc) should all be primarily/mostly/all your own work.