The Bloodmage: 5e Compatible Class

Ever thought: "I really need more spell slots. If only my magic could kill me." Well, look no further than the bloodmage! Using its own hit points to cast spells, the bloodmage uses profane damage to freak out everyone at your table. Don't worry, there's a disclaimer at the beginning to shut up anyone that gets real weird. Otherwise, play as a spelling vampire! Punch things and drain their llife! Create a bloodclone to do your bidding! The options are myriad, and they all want to kill you.

- from the publisher's blurb