Pre-existing Systems of MagicIf you think making your own incantations sounds like a lot of work, or you'd like the benefit of a preestablished system with effects and rules already set into place, you have a lot of options to choose from!
All of these spell systems are available at the Liberty Center for students, though you may want to check with available magic teachers to see who has the competency to teach a particular system. (If you RP a magic teacher and your character can teach a particular system, please do let me know!)
Dungeons & Dragons -
[link]Dungeons and Dragons has been around a long time. It's a paper-and-dice roleplaying game. D&D actually publishes entire books of spells which you can find at most any major bookstore. You can also find spells created by players on the Internet. Additionally, the D&D universe contains lots of spells besides just incantations.
Upside: Literally thousands of spells to choose from organized into different categories of magic, and the spells are designed to be balanced. All the spells have fully-detailed effects, including length of duration and area of effect and every other technical detail already worked out for you! You can also figure out your own spells.
Downside: The spell names are generally fairly generic, and if you want to use D&D spells in any seriousness, it's advisable to actually buy one of the books, which will run you about $15-30. If you do opt to buy a book and you only want the spells, get one of the Spellbooks, NOT the Player's Guide. Because these are copyrighted, printed materials, it may be difficult to find all of the spells online. Creating your own spells may involve a bit of work.
Available From: Cecil Lavanchy (romesilk)
Harry Potter -
[link] [link]Harry Potter is a series of books abotu a wizard named Harry Potter (no, really?) who goes to a school called Hogwarts and studies magic with his friends. He also defeats an evil wizard named Voldemort. (I'm sorry, was that a spoiler?)
Upside: Popular, people will understand immediately what's going on when you use Harry Potter spells. The system is consistently Latinate so it's easy to make up your own spells in the same style.
Downside: Popular, don't expect to be unique. Your character must be a wand-user. The actual list of spells used in the books and other media is fairly limited and rather redundant.
Available From: Peri Stillbrook (romesilk)
Video & Computer GamesLots of games have spell systems, everything from Final Fantasy to World of Warcraft, even Pokemon! I won't list them all here, but if you like the spell system in a certain game, you can probably google up a spell list for it.
Upside: Lots of choose from.
Downside: Spell systems created for video and computer games generally aren't very well-developed and consist mostly of spell names and shiny effects on your enemies. Many of them may be too powerful for a modest roleplay setting like the Center, and a lot of them will be combat-based, which might not be so useful in regular RP. But, hey, if you see it, you can probably adapt it to work!