Here's a list of spells that the four sorcery schools in the Wolf Sea teach. The list of spells marked "Common" can be learnt by a wizard in any tradition. Barons of Hell are demons, Drowned Legions are masses of undead warriors and sailors who drowned, Undead Wyrms are self-explanatory, and Tulpa-Shoggoths are creatures made of protoplasmic dream-stuff.
You can also get a sense of the cosmology of the setting. Along with the living world, there's the Afterlife, Hell, and the Dreamworld. The Afterlife is where dead souls go, whether for good or ill. Hell is an alternate world, not where the wicked end up automatically, but rather an alien reality, and the Dreamworld is where the contents of dreams come from and go back to once the dream ends.