This is the fifth installment of the Monthly Topic Challenges with topics suggested and voted on here. This month's topic is "On-and-onograms" (suggested by Stiv) and will span from the 1st of November to the 30th of November. During this period, we will compile the list of relevant questions and post it as an answer to this question.
In the meantime, please go and propose and vote on future challenges!
Everyone have fun, and happy puzzling!
Link to other Monthly Topic Challenges.
The suggestion is copied to this post for posterity.
On-and-onogramsCreate a puzzle where the first step is a nonogram whose solution reveals further steps that must be taken. Crucially, *the full puzzle is entirely self-contained within the nonogram and flavour text*. (i.e. Not just using a nonogram as the first step in a long string of grid-deduction puzzles which require additional grids to be displayed in the post.)