Which spell do you think is possible and let's explore how it might be possible or not possible together.There might be an even better way to get things done without the kind of spell you think is needed.
Please choose a Harry Potter spell.
I assume you mean the mainstream books, or do you refer to some enciclopedia based on them? I ask because i remember there where a few enciclopedia-like books wich describe the creatures in the HP books, etc. If you could provide us with an example it would be best.