Fenris-Wolf shall run free, and advance with lower jaw against the earth, upper against the heavens (‘he would gape yet more if there were room for it’); fires shall blaze from his eyes and nostrils.
Campbell presents the Norse Fenris-Wolf’s gaping jaw as a mythic image of cosmic destruction, the maximal opening of the devouring maw as eschatological symbol.
, The Hero With a Thousand Faces, 2015thesis