The Supper's Song is sung by the supper the the Green Death ate, who also happened to be another Seadragonus Giganticus Maximus. The song is not heard in full length (instead the song is written down in the book after someone takes a pause to listen to it), so it is slightly notable that the 2nd verse and 3rd verse are not the same, hinting that had we heard all of the song, those parts might have been the chorus. The Green Death also has a verse in the epilogue.