Heck, I'm surprised there aren't magical girls, wannabe Z fighters, mystical ninjas, mystic adepts based on fighting games, Cthulhu Mythos mages, why the psionic tradition gets tossed by the wayside when there's a huge contingent of people here and now who think that's how magic works, and people who summon watcher or task spirits that look like RTS minions.
Actually, I've built several Cthulu Mythos mages, as a possession tradition. It was hard to build because you're tempted to make water spirits the key spirit for everything.
I can see that.
Here's the way I did it:
The MythosThere are dark and dangerous, unimaginable things in the universe that human minds cannot comprehend without going mad.
Combat: Man (For Nodens and its ilk)
Detection: Water (For the secrets hidden in the ocean)
Health: Beast (For Shub-Niggurath and others)
Illusion: Guidance (For Dreamlands creatures)
Manipulation: Plant (For Mi-Go)
Drain: Willpower + Intuition
The Mythos was a cosmology whose roots lie in the early twentieth century with a man named Howard Philips Lovecraft; he created a series of alien entities mistaken by early man for gods and their technology mistaken for magic. Later authors made these entities into true alien gods, their powers fueled by no science that could be known in any context, and the lands outside earth interminable and impossible to comprehend. Mythos mages take all these elements and combine them into a cohesive whole and an attempt to harness the power of these beings for their very own; such mages are known for summoning creatures whose power far outstrips their own, leading to madness or death.
Mythos mages believe that humanity can never understand the universe and so look to higher powers for the answers to these mysteries, or do not look for them at all and let the magic do its own work; after all, the Mythos and various books and tomes they reference tell them that to know the secrets behind their power leads only to death.