Written On One's Back
A character (usually female) has a secret message or spell written on her back.
She has a secret. She's definitely hiding something. She wants to show you, so she starts taking off her shirt and... turns around. There is a message written on her back. Or maybe it's a spell. It could be anything, but it's definitely REALLY IMPORTANT. (needs rewriting)
Hello, Unknown Troper. You'll need to get known to lend a hand here.