I'm sure this isn't a new idea as I'm hardly one to be accused of originality, but I do think it's a good idea and therefore worthy of being a topic.
The idea I'm talking about is that of adventure seeds. These are very basic concepts that a DM can grab at a moment's notice and use to spawn, at the very least, a session of adventure.
I don't know how others may have formatted this concept but what I'm going to ask of people is that we all borrow from the Hollywood formula known as 'high concept'. In a nutshell, if your adventure seed can't be described in one (succinct) paragraph, then it ain't for this thread.
I'll start off proceedings with one that I came up with for a session I ran today:
