School of Satanology

Magic uses who devote themselves to the study of the 9 hell's, in mastering devils and using them as instruments of there will. Why anyone would devote themselves to such study is beyond the reason of most wizards but that's not to say they don't exist.

Summoners Claw

Beginning when you select this school at 2nd level, your left hand twists into a blackened (yet functional) infernal claw. When casting a spell that can summon a devil, you can use your Summoner's Claw as the material component for the spell, waiving any gold costs associated with the spell. Once you have done so, you must finish a long rest before using the claw in this way again.. 

Imp familiar

Starting at 2nd level, you can add the find familiar spell to your spellbook if you don't already know it. When casting this spell, you can choose to have your familiar take the form of an imp instead

Devils initiate

Starting at 6th level, you add the spell Summon Lesser Demons to your spellbook, if you don't know it already. When you cast this spell, you always summon Devils rather than demons, but the spell otherwise remains the same. If you later learn a spell that specifically referenced Demons in the text, replace all instances of the word Demon with the word Devil. After gaining this feature any demon you meet will always be hostile/unfriendly your character.

Devils Graduate

Beginning at 10th level, whenever you summon a devil with a CR equal to or less than your level into the material plane, it recognises you as an equal. Whilst this effect persists, you have advantage on all social checks made to interact with it. This effect is broken for 24 hours if you attack the devil or cast another spell upon it. The devil remains unfriendly to your allies.

Infernal Promise

Starting at 14th level, a bond is struck due to your work service to the Nine Hells. if you are killed, you are resurrected in at the end of the turn as an Infernal version of yourself. You lose all your old statistics and instead choose the statistics of a Devil with a CR no greater than 1/2 your current level. You return to play using those statistics, which is a permanent change. This is now your true form, and cannot be dispelled/reversed. If you die in this form, you are condemned to fulfill your obligations in the Nine Hells. You are unable to be resurrected or leave/ be summoned forth from Baator ever again