I wanted to know if their were any space leviathans/dragons/krakens etc that cause chaos where ever they go, destroying ships and planets.
I just watched the latest Hobbit, sooooo drawn out, but Smaug is amazing, and I wondered if 40k had any equivalents to the chiefest of calamities.
I know the maiden world Eldar fly on the backs of dragons, but they don't really count, since a couple bolter rounds could easily take them down. That one eyed carnifex kind of fits the bill, but he is usually accompanied by more Nids, so not really a calamity.
I'm talking anything that could single handedly bring down a battle cruiser, or lay waste to a great city, and requires an army to defeat.
Thanks ahead of time for all responses.