Alright, i’ll try my hand at this.
How about a battle against your “Dark Side” (or light side if you consider yourself evil). Keep in mind that this is more than just a DC, it is you and your fears. It has the power you do, and it will show up as you in some twisted way. 
If you defeat it, you win some sort of prize. It will let you do something you can’t normally in dreams, a way to get over your fears, or something else.