From publisher blurb:
The Luck Eater Warlock is a "minor magecraft" class, which interacts with the magecraft features of the Magus class. These classes are designed to be setting-appropriate to the material the Magus is used for, while allowing players to utilize other classes and not be tied down to a full spellcaster. More will be made available!
The Luck Eater is a being that exists to toy with the fate of mortals. Not limited to a specific creature type, they are beings of any kind that hide away from the affairs of the world, manipulating it for their own gain.
As their agent, you can manipulate your own luck and steal the fortune of those around you. The subclass grants divination wizard-like abilities, allowing for the pre-emptive manipulation of rolls and stealing the fortune of others.