This was made for the 12 word RPG jam.
It was more fun than I anticipated, and I have never written a table top (or under-table, as is likely here) RPG before.
I attempted to meet all 3 themes.
Folklore - for me I consider J.R.R. Tolkien and C.S. Lewis to to have written the most influential "folklore" and I particularly was inspired by C.S. Lewis's Voyage of the Dawntreadder, where Eustace becomes a dragon.
Cartography - I ask you to make a map of where you live, and imagine how the things in your room/house/dwelling would translate to a grand fantasy map.
Forbidden - Only the dragon is allowed in the dragon cave. If there are curious creatures nearby, they out to beware, and heed the roaring.
I know these seem like a stretch, but so is this whole thing for me :)
As an aside, I'd like to mention that when my 5 yr old asked me what I was doing, and I explained that sometimes adults need help to pretend, and that I was teaching people how to pretend to be a dragon, my child explained that he was a dragon earlier today at his grandparent's house. Enjoy.