Sergio Aragonés' Groo: Mightier Than the Sword — Dark Horse Comics
Issue: #3
What's the one thing that can scare even Groo? Relmihio, son of the Pipil Khan and Groo's latest, greatest enemy has found out. You will shiver in terror, you will quake in awe, you will absolutely plotz as Groo faces his most horrifying opponent: The Mighty, The Dreadful, The Ghastly . . . Groo? Brought to you by Sergio Aragonés and Mark Evanier.
First appearances: Relmihio
Creators: Tom Luth, Scott Allie, Sergio Aragonés, Mark Evanier, Stan Sakai, Amy Arendts
Characters: Rufferto, Relmihio, Groo, Pipil Khan