Ok, not a school of magic, like conjuration, abjuration, etc. nor necromancy, pyromancy etc, but magic category as in what fuels the magic.
If we take normal magic as being fueled by mana, then these two new categories are either a subcategory of blood magic (fueled by blood) or what blood magic is derived from.
Anyway, here it is:
1. Lifeforce as a form of fuel. With every spell cast your lifespan gets a bit shorter, which makes you age quicker until you die. If immortal this can either make you exhausted/lethargic or make you temporarily mortal if you overdraw on your lifeforce.
2. Age as a form of fuel. This one is more abstract, but basically it's the opposite of the above. Each spell cast ages you down until you eventually become a fetus and disappear out of existence. This essentially makes you immortal (if you cast often enough to halt aging), but makes recharging your spell fuel take super long (because you have to wait to become older).
Now, I'm not sure what to call either of these. Either way, there's also the secret, third, magic method.
3. If you somehow manage to learn both the "aging up" and "aging down" method, you can employ both at once to basically have unlimited magic fuel. However, since each of them is "pulling" you in opposite directions, this method would cause great pain. So basically, it's pain as a form of fuel.
Once again, I also don't know what to call this one.
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