You are able to cast cantrips that cost no resources to cast, but similarly, aren't particularly impressive. This catalog of cantrips initially has 100 cantrips. You are able to improve different aspects of each cantrip by focusing on the part you wish to improve while practicing. Mastering a Cantrip takes roughly 2000 hours. Once you've mastered a Cantrip you gain an appropriate passive ability that's always up and an active ability that supercharges the cantrip for one use at the cost of temporarily burning it out called your Overmagic.
Cantrips can be taught or enchanted into items at a 'lower' level than your level of mastery. You are able to develop metamagics through willingly limiting your usage of a specific facet of a wide variety of cantrips, forcibly limiting the durations of your cantrips can allow you to develop metamagics that extend the durations of your magic. This Cantrip Catalog rests in an internal pool of magic that used to develop more and new types of magic.