The actual title of this strip is "My name is Odobenus Rosmarus. You killed my father; prepare to die." That just wouldn't fit on the page. The title, of course, comes from The Princess Bride. The quote comes from the Dreyfus affair, but that doesn't mean anything to you, does it? You kids today have no sense of history.
The walrus is a Tuskarr from DC Direct's World of Warcraft toys. The man he's after is Kwinn the Eskimo. Judging by their comparative sizes, you can probably tell one of them is photoshopped, but can you tell which one? Oh, and only some of the snow they're standing in is real - the rest was made in Photoshop, as well.