Sergio Aragonés' Groo: The Hogs of Horder — Dark Horse Comics
Issue: #4
The kingdom of Horder is about to be destroyed by the most horrendous and least stoppable force in the world . . . and, amazingly, it isn't Groo! But he's around and making his presence known, which means that he's making things worse. If you didn't buy the first three issues, buy this one, see how it ends, and then go back and find the first three so you have a clue as to what any of it mean...
Creators: Tom Luth, Sergio Aragonés, Mark Evanier