This is god's vessel that descends along with angels to purify the world of evil. The center of the creature contains the "eye of god" and the small tentacles above act as the detector or evil energy sensor. The long tentacles then drains the evil energy towards the eye of god for purification. The whole vessel radiates with godly aura that not only protects the rather weak body structure of the vessel, but it can also cloak the creature and conceal it from the human eyes. When the sky glows with beautiful colors, perhaps it's not the arctic lights, and the sparkles shimmer in the sky might not actually be stars.
It's like the war tank of the gods that aid the angels in the endless war between good and evil.