Warlock

Warlocks are the most esoteric magic users, and the most hated and feared by the general populace. Fundamentally, they are defined by drawing on power from outside the sphere of protection that surrounds the world. This can come in many forms, but it means that almost all warlocks, and all powerful ones, know at least one way to open a whole in this barrier. Some directly access the esoteric winds that are around the world. These warlocks are the least evil on average, and are often simply wizards attempting to supplement their spell repertoire. The more insidious practice is more akin to the magic of a priest, where a warlock will directly contact the demons that inhabit the space outside the world, and use their powers instead. The most extreme from of this is to allow a demon to enter the world. This requires great skill, and only parts of a demon or small demons have ever been allowed in.   Most nations have laws against these magical practices, but in some places it is possible to be licensed to access the esoteric winds. Contact with demons is almost universally banned, however.