Kraken

The Deepcold's most feared creations are the Krakens, monsters and lords of the deep that move with long armored tentacles and break nations with titanic claws and innate mastery of the seas. During the First War the Krakens served as living seage-engines and monstrous warriors, tearing down cities and fortresses.
After Thrym split the Deepcold in two, the Krakens raged against the world, threatening to swallow it under the waves. Thrym, Surtur and Stronmaus worked together to capture the most ancient of these Krakens, the so-called Nadir Krakens, firstborn of their kind, as well as the remaining elder elementals and vestiges of the Deepcold in great underwater prisons, isolating them from the rest of the world.
Stronmaus also cast a powerfull spell on the remaning Krakens, binding them with words of power and locking them to certain regions. To this day, most of the old krakens are bound by the Giants and can be summoned by powerful wizards who have been taught the giant incantations. Even descendants of these Krakens are easier to bind with magic, a fact that has both been used for good and evil.
  A few of the old Krakens hav emanaged to break their magical chains, and these are among the biggest threats to the balande, as they always seek to free the Deepcold.