From publisher blurb:
The Thaumaturge is a new take on magic for your OSR compatible game!
Bored of the certainty of Vancian magic? Want your magicians to act more like the magicians of fiction and lore, where magic is risky and requires the caster to actually use time and tools to increase their chance of success? Then the thaumaturge is for you!
A complete 20 level class compatible with any OSR game, the thaumaturge replaces the standard magic-user. Their magic is difficult to use, often time consuming and inconvenient, but dripping with flavor. A bad roll can have disasterous consequences, while a good one can cause tremendously potent results.
Learn any spell of any level you can find, but will you be able to cast such complex magic or will you destroy yourself and your allies in the attempt?
Also included are 6 new magic items and 2 new spells to use with the class.