User blog comment:Regulus22/Garden/@comment-1038387-20120825130401

I'm pretty sure the "actual" Jörmungand had nothing to do with tectonic plates. It was just a means to signify the edge of the known world. And with the mention of Eden, the biblical snake seems more likely.

It might very well be the Serpent is never touched up again, just like the ending of #11.