At The Limit
As Castiel travelled he saw many different wonders. Mountains of bones where once millions died fleeing from the great evil, the salt plains where once a great empire stood and even floating massive rocks high in the sky where once legendary mages experimented. What he saw more often was death and destruction though, monsters and demons. He despised those. Years ago he set off to search for a way to break through the limit imposed on every being of this world, to break through level one hundred. As years passed he cared less and less.