Well the main story is quite intense right now. And it seems like whaleship is not enough to fight these ancient pest, so maybe... new game mode will be available in the future?
Aqua-shadow available around February last year, so it's possible this incident will lead to a new mission type.
Originally Posted by Unregistered
Níðhöggr, more commonly written as Nidhogg.
When first saw it, I thinking it's a very weird word. So it's Nidhogg... that terrify being in Norse myth.