Hello and welcome to the site dear! I'd suggest starting with the Featured Articles and the pinned posts in the General Information section. I'll provide links to both of those later in this post.
That said, common sense is your friend when looking through the spells here. Anyone at a council position can add spells, and not all of those spells are based in truth. Anything that says it can change your physical appearance or form is fake, as are the spells that claim they will allow you to control the elements (i.e fire bending, throwing fireballs, etc). Just use common sense. If it sounds too good to be true, or like something out of Avatar or Harry Potter, it is fake.
Featured Articles -
https://www.spellsofmagic.com/featured_articles.html
General Info -
https://www.spellsofmagic.com/read_topic.html?topic=5
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