Three humans from Empyria, labeled with their cities of origin:
The diagram shows one possible way to construct a magic circle for a fireball spell. The spell is broken up into different sections, each of which has a text label explaining its function.
From outside to inside, the sections are:
Another smaller circle is shown, similar to the first but with fewer repeated symbols. Repeating a glyph intensifies its effect & increases the circle's power. something like this would also work, but produce a smaller fireball.
An image of three monsters: