Could You Kill Vampire Slack?!?! (Using 1 punch)
Vampire Slack is a thing I made up based on my teddy. It cannot be killed and it is a vampire bat. It goes up to peoples houses and asks if they like her tuxedo.
If they say no, she leaves. If they say yes, she bites their neck and kills them. It is actually very strange that she doesnt like people who like their tuxedo...