Scare my mail carrier

My mail carrier loves seeing all the decorated mail that comes to my house. This time, I want to creep her out a bit. Decorate an envelope for your partner and make it spooky. Now, I'm not talking decapitated bloody heads and gory spooky (although if that's your thing, then good for you!), I'm just thinking spooky old pictures, witches, monsters, etc. Something more than just cute pumpkins and Casper. Example- if your partner likes walking dead, then do a zombie theme, if they like witches, don't send Glenda, send the Wicked witch of the west! Catch my drift ? Make this envelope something that they will want to keep. Include a flat surprise inside.

If you all like this swap, I will do a series of envies with different themes. Let me know.