They travel the night, searching for some tragedy to attach themselves to and define themselves by. You can pass them on the road, though you mustn’t stop to talk to them. They will be travelling on foot and seeming like shadows. Some say they were once human, though these rumours are unsubstantiated. They have an almost human form. You can see them at the outskirts of towns where there have been gas leaks or plane crashes, and you can see them, one for every life taken, slowly sinking into the ground until they are the saplings of some unknown tree.