I was hoping that we collected energy we use for magic and that if we didn't use it the excess energy would stretch our metaphorical container allowing for more magic to flow through. But I guess that's not the case. Is it like the Saiyan?
No idea what the saiyan are like.
There is no mana cap. There isn't collected energy. There's just how much potential for it in specific areas you are capable of and how much skill you have with it. Someone with pyromancy could shoot flames at a wall all day long and not get tired.
The two main abnormals are as follows:
Manasinks are people who can crystalize ambient magic as well as active magic. If someone is using precog near one, they can crystalize that, preventing the person from using precog until they stop crystalizing precog or the precog user gets out of range and at the same time providing themselves with a crystal specifically built for precog. Which they can burn through at any time. If a manasink is in an area with lots of death and has some form of enchantment for example, depending on their skill, they can crystalize the ambient death into a death focused enchantment crystal. Which they can burn through at any time to use for a death focused enchantment.
Antimagi are people who can make a No Magic Zone around themselves. People cannot use magic around them if they have it active. It's technically a form of magic, however Antimages still cut off Manasink abilities. Antimages do not stop kinetic objects however. If an antimage shuts off the magic of a terramancer for example, and the terramancer had already launched a spear of rock at them, the rock's still gonna keep moving. It's not just going to randomly lose momentum.
These two are abnormal in that ranking only affects range and not potential power. IC, nobody knows why that is. It's abnormal and it's been noted down as abnormal.