Ark 2
civilizations rise through the exploitation of resources, and when the resources run out the civilizations cannibalize themselves to death. the vanishingly few civilizations who avoided their own destruction expanded into space.
The Dragon, the King and the Kobold (vol. 2)
Her mind can only grasp at what it means; to watch the birth and death of entire species, to watch civilizations rise and crumble to dust overnight, to experience the thrill of flight and the pursuit of power... and the cost of it.
A Pilot Chosen
The core let civilization rise, guided it with hearts, then destroyed it to use the bio-matter to expand itself and its army. for what purpose, hiccup didn't know and didn't want to know. whatever the purpose, it couldn't be allowed to continue.