"Fire. The words do not exist to describe the beauty and the power of fire. Pyro would invent words to do the job, but this is unnecessary. Fire is already the best form of its own expression. Why be a poet of words, when you can be a poet of fire? That is what Pyro says. And that is why you will want to be a sorcerer, an artist with the flame." – The Manual, The Book of Pyro
Sorcery is an overall name for all of Pyro's spells. Its practitioners are called Sorcerers.
In the campaign there are several known Sorcerers:
Buta – Pyro's most loyal and ruthless of Sorcerers, also his de factochampion.
Sorcha – The Empress of Pyroborea, a Sorceress and Pyro's, only de jure, champion (due to her wavering loyalties).
Hachimen – A mercenary wizard who specializes in Sorcery.
Eldred – If the campaign is played out serving Pyro he too can become a Sorcerer.
The list of spells is composed of three types of spells: the spells used to summon the Proles, the actual wizard spells granted by Pyro and the spells that every god's wizard needs to have to function.