Luckily I was there in the middle of the city at the precise moment when a portal from another dimension opened up. Out came these tall creatures with tentacles and rubbery skin. They looked at me with eyes that were coldly arrogant and inhuman. As I was a sorceress I used what powers I had to push them back through the portal and then closed it shut. The entire city celebrated the victory, but our revelry only lasted for one day.
The next day more portals began opening up everywhere and these alien creatures marched out in overwhelming numbers.
This was written with the prompt for one day provided by the Carrot Ranch July 25 Flash Fiction Challenge.