Those other lists of 30
Larping is Live Action Role Playing. Instead of sitting around a table, play is done “in action”, up and moving about. Any resolution besides social ones are done by some “lite” mechanic. It can be a great deal of fun.
All spell casters gain their abilities through a form of demon possession. So in order to gain magical abilites, PCs must track down and trap demons. Of course there are some pretty powerful demons, if the demon is stronger than the PC, the PC could find themselves subjugated to the Demon's will.