Writing Prompt #84

Here is this week's speculative fiction prompt. I'm not labeling it this week, so take it whatever direction you choose. Have fun with it!

You have a superpower, but it only works when adrenaline courses through your veins.

Writing Prompt #53

Here is this week's speculative fiction prompt. I'm labeling it as fantasy this week, but take it whatever direction you choose. Have fun with it!

You often turn invisible, but can't control when or how long.