Cough. Concept sketch for 10
Still got a lot of work with this one though.
But I really liked to think of the head actually being the countdown.
Now, even if it's not complete, I can tell the dynamic.
Heavy biomechanical sea monster who obviously is slow of pace due to its great mass dragging along the waters it contaminated. But as it's hit and disturbed to reset its countdown, it loses some of that mass, thus gathering speed on its wander.