Sergio Aragonés' Groo: Mightier Than the Sword — Dark Horse Comics
Issue: #1
Pipil Khan wants nothing more than to name an heir and shuck his mortal coil, but one thing stands in his way: Groo! It seems Pipil Khan just can't rest easy until the world's dumbest barbarian is out of the way, and he'll give his kingdom to the one of his sons who can accomplish this. But they're gonna need help, and they just might find it in the one person tough enough to take down Groo: namel...
Creators: Tom Luth, Scott Allie, Sergio Aragonés, Mark Evanier, Stan Sakai, Amy Arendts
Characters: Rufferto, Groo, Pipil Khan