Curses - Time for Some New Magic

I'm developing a curse magic for a new solo, based on the Caves of Nerja I recently visited and photographed. There will be curses, jinxes and hexes being bad and hoodoos being good. They work in different ways and are based on the average of WIZ, LK and CHR with a character needing to roll 15 or better at creation on all three to be able to practise curse magic (maybe WIcka or WIC).