It's so kind of him to ask that! Such hospitality.
Oh, we can see Wurm's worm at the right of the second panel.
Oh boy, Burk may get his wish to fight a hero.
Burk might be not allowed to fight heroes, but nobody told anything about villains!
Burk can't fight Shadoers, but he's fine to fight heroes if it's in the arena. Which I foresee happening.