You have a wide array of stamps from spooky graveyards
To those that can be used outside in a large field for both before and after battles:
They even have ones for us HeroQuest fans:
The best part about this is that it's still open! You have till Saturday Aug 24, 4:50pm EDT according to kickstarter to get in on the goodness.
For anyone interested you can follow the link at the footer to check it out yourself.