ladybug by paul harris
100 bucks but so worth it
This is why you should read the entire post before skipping straight to the Reply button. I'm just going to repost the answer I gave at E so that this thread isn't just recommendations that were already named in the first post.
That sort of material can be difficult to track down because most magicians wouldn't know what to do with it if you handed it to them on a silver platter.
There's a certain Kenton Knepper manuscript that makes mention of such material. I also recommend reading Harlan Tarbell's essays in the Tarbell Course detailing the history of magic, superstition and religion and witchcraft. There's also numerous fantasy novels and movies to draw inspiration from. Pen and paper RPGs also tend to have a lot of material to mine from.
A lot can even be done with a simple cosmetic change. For example, when using mental magic to reveal a hidden object, use a naturally occurring puddle as a scrying mirror. Torn and restored effects work equally well on leaves, giving you an out for if someone wants a repeat performance of Paul Harris's Leaf. Bonus points if you also have Biokinesis and use it to temporarily turn your eyes a brilliant green. A false transfer provides an easy way to turn a rock into a chunk of clay. Same principles allow you rust a metal object with your touch or your breath.