Cow is a Hearts of Stone joke card with real use. It’s a 0-strength Ranged Combat unit with Summon Avenger: when it’s removed from the battlefield, it summons the Bovine Defense Force, an 8-strength Close Combat unit.
So if your opponent scorches or otherwise removes the cow, you get a much bigger unit in its place.
You don’t win this one. It’s lying loose in the upper loft of the barn in Brunwich, the wedding venue in Dead Man’s Party. Only one copy exists, and you need Hearts of Stone.
