The link is to current, so it won’t work when the comic updates. The caption is: “Either you get this one or you don’t.” There is a simple drawing of a duck, with blue arrows on it.
The only thing I can think of is a reference to Avatar: The Last Airbender. If it’s something more abscure and funnier, I’d like to know.
Feel free to speculated if you aren’t completely certain. The arrows could also be the directions that the duck could move. A friend of mine said that in some stories, when avatars become gods, they assume the form of an animal, and this could be Aang being promoted.
I don’t read Sluggy Freelance, but looking through the past few comics, this looks like it’s part of a story, not a one-off. The comic before it talking about making a fire-breathing duck, and mentions the four elements, so it may very well be an Avatar reference.
Edit: I know just as much about Avatar as I do about Sluggy Freelance, but now I see that Aang does have arrows down the sides of his arms as well. So yeah, definite Last Airbender reference.
Looking at the previous strip - definitely the Avatar. The woman refers to it as a master of all 4 elements and seems to be going through the motions of Bending.
