At any rate, here is the first challenge. The following line can be used as dialogue or narration, and the tense can be changed to fit the piece you want to write, but try not to alter it too much...that would sort of defeat the whole point.
He felt the presence long before the creature made itself known to him
Have fun with this one. You've got a week to work on it. For now at least I'm going to run the challenges a week at a time, new challenges posted on Saturday.
**You can respond to the challenge as many times as you want to within the week.