Presenting the Cursed Knight, a class about fighting to control the monsters within! This class is creative commons licensed, and was developed pretty openly with the feedback of my bros over on the Something Awful forums, so you can probably get your hands on it somehow or other if you’re a clever sort. However, I was able to obtain some awesome cover art for this one and would like to keep doing so in the future, so any purchases are hugely appreciated.
http://www.rpgnow.com/product/115567/The-Cursed-Knight–A-Dungeon-World-Playbook