I typically try 2 methods in order to cure my Writer's Block: 1: Write a book/story of a premise simpler than what I normally write. 2: Writing with absolutely no premise. Both of these are used to loosen myself up, reminiscent to a warm-up exercise, so that ideas will start flowing easier so to begin writing coherent plots for the other works or simply to finish something else. Additionally, these methods can potentially turn into a relatively original or interesting premise. Well, my question is, while utilizing the former, if I am unable to think of much for a premise and I only have a single or very few sentences or words describing it, how do I best go about developing it? As an example, this is the description of the premise I have so far: In a turn on social segregation, there are humans who can be born into this medieval-esque world with characteristics that define them as "broken," and being such causes the person who is "broken" to be subjected by many to abuse and/or separated from even their parents. These "broken" humans are only accepted while acting as servants for the "normal" people, or, as it is said to them, "You are only able to be forgiven while being useful to someone else." ... Okay, it is not wholly original in the slightest. In fact, its quite typical. My plans are to make this a magic-heavy world and to make it relevant to the "broken" humans in certain ways that can hopefully make the plot stand out more. The problem is even while utilizing my aforementioned exercise methods I find it hard to think of ways to develop the premise at all and when I start writing I lose myself in frustration of being unable to let anything come to me. What exactly would be the best way to go about developing a premise for a novel/story?